21760135616 has 28 divisors (see below), whose sum is σ = 44669247720. Its totient is φ = 10504892160.

The previous prime is 21760135613. The next prime is 21760135627. The reversal of 21760135616 is 61653106712.

It is a self number, because there is not a number n which added to its sum of digits gives 21760135616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21760135613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5860250 + ... + 5863961.

Almost surely, 2^21760135616 is an apocalyptic number.

It is an amenable number.

21760135616 is an abundant number, since it is smaller than the sum of its proper divisors (22909112104).

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

21760135616 is a wasteful number, since it uses less digits than its factorization.

21760135616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724252 (or 11724242 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 21760135616 in words is "twenty-one billion, seven hundred sixty million, one hundred thirty-five thousand, six hundred sixteen".