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21236357046 = 2329532302793
BaseRepresentation
bin10011110001110010…
…010001011110110110
32000210222221201021110
4103301302101132312
5321443001411141
613431132455450
71351154025252
oct236162213666
960728851243
1021236357046
119008408403
12414801a586
13200588b758
14105659b262
15844588e16
hex4f1c917b6

21236357046 has 32 divisors (see below), whose sum is σ = 44766315360. Its totient is φ = 6705730304.

The previous prime is 21236356997. The next prime is 21236357059. The reversal of 21236357046 is 64075363212.

It is a super-2 number, since 2×212363570462 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21236356995 and 21236357013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142175 + ... + 1160618.

It is an arithmetic number, because the mean of its divisors is an integer number (1398947355).

Almost surely, 221236357046 is an apocalyptic number.

21236357046 is an abundant number, since it is smaller than the sum of its proper divisors (23529958314).

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

21236357046 is a wasteful number, since it uses less digits than its factorization.

21236357046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302880.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 21236357046 in words is "twenty-one billion, two hundred thirty-six million, three hundred fifty-seven thousand, forty-six".

Divisors: 1 2 3 6 29 53 58 87 106 159 174 318 1537 3074 4611 9222 2302793 4605586 6908379 13816758 66780997 122048029 133561994 200342991 244096058 366144087 400685982 732288174 3539392841 7078785682 10618178523 21236357046