18969193936 has 40 divisors (see below), whose sum is σ = 45821692224. Its totient is φ = 7390594560.

The previous prime is 18969193927. The next prime is 18969193939. The reversal of 18969193936 is 63939196981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969193939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7697305 + ... + 7699768.

Almost surely, 2^18969193936 is an apocalyptic number.

18969193936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18969193936 is an abundant number, since it is smaller than the sum of its proper divisors (26852498288).

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

18969193936 is a wasteful number, since it uses less digits than its factorization.

18969193936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15397099 (or 15397093 counting only the distinct ones).

The product of its digits is 17006112, while the sum is 64.

The spelling of 18969193936 in words is "eighteen billion, nine hundred sixty-nine million, one hundred ninety-three thousand, nine hundred thirty-six".