20004614640 has 120 divisors (see below), whose sum is σ = 67207729680. Its totient is φ = 5332534272.

The previous prime is 20004614621. The next prime is 20004614659. The reversal of 20004614640 is 4641640002.

20004614640 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 4 + 6 + 14 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (20004614621) and next prime (20004614659).

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3517239 + ... + 3522921.

It is an arithmetic number, because the mean of its divisors is an integer number (560064414).

Almost surely, 2^20004614640 is an apocalyptic number.

20004614640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20004614640 is an abundant number, since it is smaller than the sum of its proper divisors (47203115040).

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

20004614640 is a wasteful number, since it uses less digits than its factorization.

20004614640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10591 (or 10582 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 20004614640 in words is "twenty billion, four million, six hundred fourteen thousand, six hundred forty".