20381816838026 has 48 divisors (see below), whose sum is σ = 36222548163840. Its totient is φ = 8574640794720.

The previous prime is 20381816837957. The next prime is 20381816838041. The reversal of 20381816838026 is 62083861818302.

It is a happy 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, 6269390 + ... + 8948121.

It is an arithmetic number, because the mean of its divisors is an integer number (754636420080).

Almost surely, 2^{20381816838026} is an apocalyptic number.

20381816838026 is a deficient number, since it is larger than the sum of its proper divisors (15840731325814).

20381816838026 is a wasteful number, since it uses less digits than its factorization.

20381816838026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15217779 (or 15217772 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 20381816838026 in words is "twenty trillion, three hundred eighty-one billion, eight hundred sixteen million, eight hundred thirty-eight thousand, twenty-six".