18701900136723 has 12 divisors (see below), whose sum is σ = 26067172719560. Its totient is φ = 11925849361536.

The previous prime is 18701900136719. The next prime is 18701900136737. The reversal of 18701900136723 is 32763100910781.

It is not a de Polignac number, because 18701900136723 - 2² = 18701900136719 is a prime.

It is a super-2 number, since 2×18701900136723² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18701900136713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5892216478 + ... + 5892219651.

Almost surely, 2^{18701900136723} is an apocalyptic number.

18701900136723 is a deficient number, since it is larger than the sum of its proper divisors (7365272582837).

18701900136723 is a wasteful number, since it uses less digits than its factorization.

18701900136723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784436178 (or 11784436155 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The spelling of 18701900136723 in words is "eighteen trillion, seven hundred one billion, nine hundred million, one hundred thirty-six thousand, seven hundred twenty-three".