21510874683 has 12 divisors (see below), whose sum is σ = 32422188240. Its totient is φ = 13717079376.

The previous prime is 21510874663. The next prime is 21510874709. The reversal of 21510874683 is 38647801512.

21510874683 is a `hidden beast` number, since 2 + 1 + 510 + 8 + 74 + 68 + 3 = 666.

It is not a de Polignac number, because 21510874683 - 2¹⁶ = 21510809147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21510874663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51958428 + ... + 51958841.

It is an arithmetic number, because the mean of its divisors is an integer number (2701849020).

Almost surely, 2^21510874683 is an apocalyptic number.

21510874683 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21510874683 is a deficient number, since it is larger than the sum of its proper divisors (10911313557).

21510874683 is a wasteful number, since it uses less digits than its factorization.

21510874683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103917298 (or 103917295 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 21510874683 in words is "twenty-one billion, five hundred ten million, eight hundred seventy-four thousand, six hundred eighty-three".