21534510682 has 16 divisors (see below), whose sum is σ = 33057161280. Its totient is φ = 10515520512.

The previous prime is 21534510671. The next prime is 21534510707. The reversal of 21534510682 is 28601543512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246419 + ... + 1263577.

It is an arithmetic number, because the mean of its divisors is an integer number (2066072580).

Almost surely, 2^21534510682 is an apocalyptic number.

21534510682 is a deficient number, since it is larger than the sum of its proper divisors (11522650598).

21534510682 is a wasteful number, since it uses less digits than its factorization.

21534510682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31797.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 21534510682 in words is "twenty-one billion, five hundred thirty-four million, five hundred ten thousand, six hundred eighty-two".