18600042400 has 72 divisors (see below), whose sum is σ = 47797253280. Its totient is φ = 7048431360.

The previous prime is 18600042379. The next prime is 18600042473. The reversal of 18600042400 is 424000681.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 596644 + ... + 627043.

It is an arithmetic number, because the mean of its divisors is an integer number (663850740).

Almost surely, 2^18600042400 is an apocalyptic number.

18600042400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18600042400 is an abundant number, since it is smaller than the sum of its proper divisors (29197210880).

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

18600042400 is a wasteful number, since it uses less digits than its factorization.

18600042400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223726 (or 1223713 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The spelling of 18600042400 in words is "eighteen billion, six hundred million, forty-two thousand, four hundred".