18931229800 has 48 divisors (see below), whose sum is σ = 50302985760. Its totient is φ = 6490706880.

The previous prime is 18931229663. The next prime is 18931229803. The reversal of 18931229800 is 892213981.

It is not an unprimeable number, because it can be changed into a prime (18931229803) 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, 6759754 + ... + 6762553.

It is an arithmetic number, because the mean of its divisors is an integer number (1047978870).

Almost surely, 2^18931229800 is an apocalyptic number.

18931229800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18931229800 is an abundant number, since it is smaller than the sum of its proper divisors (31371755960).

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

18931229800 is a wasteful number, since it uses less digits than its factorization.

18931229800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13522330 (or 13522321 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 18931229800 in words is "eighteen billion, nine hundred thirty-one million, two hundred twenty-nine thousand, eight hundred".