20387340137072 has 10 divisors (see below), whose sum is σ = 39500471515608. Its totient is φ = 10193670068528.

The previous prime is 20387340137053. The next prime is 20387340137083. The reversal of 20387340137072 is 27073104378302.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637104379268 + ... + 637104379299.

Almost surely, 2^{20387340137072} is an apocalyptic number.

It is an amenable number.

20387340137072 is a deficient number, since it is larger than the sum of its proper divisors (19113131378536).

20387340137072 is a wasteful number, since it uses less digits than its factorization.

20387340137072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274208758575 (or 1274208758569 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 20387340137072 in words is "twenty trillion, three hundred eighty-seven billion, three hundred forty million, one hundred thirty-seven thousand, seventy-two".