20540012664 has 32 divisors (see below), whose sum is σ = 51367680000. Its totient is φ = 6844317792.

The previous prime is 20540012653. The next prime is 20540012741. The reversal of 20540012664 is 46621004502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75064 + ... + 216135.

It is an arithmetic number, because the mean of its divisors is an integer number (1605240000).

Almost surely, 2^20540012664 is an apocalyptic number.

20540012664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20540012664 is an abundant number, since it is smaller than the sum of its proper divisors (30827667336).

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

20540012664 is a wasteful number, since it uses less digits than its factorization.

20540012664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294147 (or 294143 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 20540012664 in words is "twenty billion, five hundred forty million, twelve thousand, six hundred sixty-four".