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21165503134 = 263617166351
BaseRepresentation
bin10011101101100011…
…111111001010011110
32000122001121221222111
4103231203333022132
5321321332100014
613420122104234
71346333544136
oct235543771236
960561557874
1021165503134
118a81413856
12412834b07a
131cc3cb1369
14104add5ac6
1583d2402c4
hex4ed8ff29e

21165503134 has 8 divisors (see below), whose sum is σ = 31748944608. Its totient is φ = 10582521600.

The previous prime is 21165503123. The next prime is 21165503143. The reversal of 21165503134 is 43130556112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21165503096 and 21165503105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44059 + ... + 210409.

It is an arithmetic number, because the mean of its divisors is an integer number (3968618076).

Almost surely, 221165503134 is an apocalyptic number.

21165503134 is a deficient number, since it is larger than the sum of its proper divisors (10583441474).

21165503134 is a wasteful number, since it uses less digits than its factorization.

21165503134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229970.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 21165503134 in words is "twenty-one billion, one hundred sixty-five million, five hundred three thousand, one hundred thirty-four".

Divisors: 1 2 63617 127234 166351 332702 10582751567 21165503134