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21161002251160 = 235997530616907
BaseRepresentation
bin1001100111110111011100…
…00001011011001110011000
32202220222020122000201021001
410303323232001123032120
510233200213034014120
6113001121421354344
74312555235232112
oct463735601331630
982828218021231
1021161002251160
116819370117232
122459188a089b4
13ba6621363bc5
145322ab3503b2
1526a6a6062e0a
hex133eee05b398

21161002251160 has 32 divisors (see below), whose sum is σ = 47660010676560. Its totient is φ = 8455911014016.

The previous prime is 21161002251139. The next prime is 21161002251161. The reversal of 21161002251160 is 6115220016112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161002251161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265268574 + ... + 265348333.

Almost surely, 221161002251160 is an apocalyptic number.

21161002251160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21161002251160 is an abundant number, since it is smaller than the sum of its proper divisors (26499008425400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21161002251160 is a wasteful number, since it uses less digits than its factorization.

21161002251160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530617915 (or 530617911 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

Adding to 21161002251160 its reverse (6115220016112), we get a palindrome (27276222267272).

The spelling of 21161002251160 in words is "twenty-one trillion, one hundred sixty-one billion, two million, two hundred fifty-one thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 997 1994 3988 4985 7976 9970 19940 39880 530616907 1061233814 2122467628 2653084535 4244935256 5306169070 10612338140 21224676280 529025056279 1058050112558 2116100225116 2645125281395 4232200450232 5290250562790 10580501125580 21161002251160