20387340137056 has 24 divisors (see below), whose sum is σ = 41521630237920. Its totient is φ = 9842164203648.

The previous prime is 20387340137053. The next prime is 20387340137083. The reversal of 20387340137056 is 65073104378302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20387340137053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10984557336 + ... + 10984559191.

It is an arithmetic number, because the mean of its divisors is an integer number (1730067926580).

Almost surely, 2^{20387340137056} is an apocalyptic number.

It is an amenable number.

20387340137056 is an abundant number, since it is smaller than the sum of its proper divisors (21134290100864).

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

20387340137056 is a wasteful number, since it uses less digits than its factorization.

20387340137056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21969116566 (or 21969116558 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 20387340137056 in words is "twenty trillion, three hundred eighty-seven billion, three hundred forty million, one hundred thirty-seven thousand, fifty-six".