21607124680 has 32 divisors (see below), whose sum is σ = 48998845440. Its totient is φ = 8574793920.

The previous prime is 21607124677. The next prime is 21607124683. The reversal of 21607124680 is 8642170612.

It is an interprime number because it is at equal distance from previous prime (21607124677) and next prime (21607124683).

It is not an unprimeable number, because it can be changed into a prime (21607124683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2121606 + ... + 2131765.

It is an arithmetic number, because the mean of its divisors is an integer number (1531213920).

Almost surely, 2^21607124680 is an apocalyptic number.

21607124680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21607124680 is an abundant number, since it is smaller than the sum of its proper divisors (27391720760).

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

21607124680 is a wasteful number, since it uses less digits than its factorization.

21607124680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253509 (or 4253505 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 21607124680 in words is "twenty-one billion, six hundred seven million, one hundred twenty-four thousand, six hundred eighty".