18431427800 has 48 divisors (see below), whose sum is σ = 43161430200. Its totient is φ = 7319520000.

The previous prime is 18431427769. The next prime is 18431427809. The reversal of 18431427800 is 872413481.

It is a super-2 number, since 2×18431427800² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18431427809) 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, 303701 + ... + 359300.

Almost surely, 2^18431427800 is an apocalyptic number.

18431427800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18431427800 is an abundant number, since it is smaller than the sum of its proper divisors (24730002400).

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

18431427800 is a wasteful number, since it uses less digits than its factorization.

18431427800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663156 (or 663147 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 38.

The spelling of 18431427800 in words is "eighteen billion, four hundred thirty-one million, four hundred twenty-seven thousand, eight hundred".