20662600064 has 16 divisors (see below), whose sum is σ = 41163773820. Its totient is φ = 10331299968.

The previous prime is 20662599949. The next prime is 20662600067. The reversal of 20662600064 is 46000626602.

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20662600064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20662600067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80713154 + ... + 80713409.

Almost surely, 2^20662600064 is an apocalyptic number.

It is an amenable number.

20662600064 is a deficient number, since it is larger than the sum of its proper divisors (20501173756).

20662600064 is an equidigital number, since it uses as much as digits as its factorization.

20662600064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161426577 (or 161426565 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 20662600064 in words is "twenty billion, six hundred sixty-two million, six hundred thousand, sixty-four".