18938359036 has 36 divisors (see below), whose sum is σ = 34090781760. Its totient is φ = 9200161600.

The previous prime is 18938359009. The next prime is 18938359043. The reversal of 18938359036 is 63095383981.

It is a happy number.

It is a super-2 number, since 2×18938359036² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38570751 + ... + 38571241.

It is an arithmetic number, because the mean of its divisors is an integer number (946966160).

Almost surely, 2^18938359036 is an apocalyptic number.

It is an amenable number.

18938359036 is a deficient number, since it is larger than the sum of its proper divisors (15152422724).

18938359036 is an equidigital number, since it uses as much as digits as its factorization.

18938359036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 18938359036 in words is "eighteen billion, nine hundred thirty-eight million, three hundred fifty-nine thousand, thirty-six".