20667625616 has 20 divisors (see below), whose sum is σ = 43683845424. Its totient is φ = 9394375200.

The previous prime is 20667625609. The next prime is 20667625639. The reversal of 20667625616 is 61652676602.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58714670 + ... + 58715021.

Almost surely, 2^20667625616 is an apocalyptic number.

It is an amenable number.

20667625616 is an abundant number, since it is smaller than the sum of its proper divisors (23016219808).

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

20667625616 is a wasteful number, since it uses less digits than its factorization.

20667625616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117429710 (or 117429704 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 20667625616 in words is "twenty billion, six hundred sixty-seven million, six hundred twenty-five thousand, six hundred sixteen".