18901850688 has 112 divisors (see below), whose sum is σ = 63506258560. Its totient is φ = 5400525312.

The previous prime is 18901850683. The next prime is 18901850699. The reversal of 18901850688 is 88605810981.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (18901850683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 769231 + ... + 793422.

Almost surely, 2^18901850688 is an apocalyptic number.

18901850688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18901850688 is an abundant number, since it is smaller than the sum of its proper divisors (44604407872).

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

18901850688 is a wasteful number, since it uses less digits than its factorization.

18901850688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562681 (or 1562665 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 54.

The spelling of 18901850688 in words is "eighteen billion, nine hundred one million, eight hundred fifty thousand, six hundred eighty-eight".