18978000600 has 96 divisors (see below), whose sum is σ = 63357351120. Its totient is φ = 4671505920.

The previous prime is 18978000581. The next prime is 18978000607. The reversal of 18978000600 is 600087981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18978000607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1208739 + ... + 1224338.

Almost surely, 2^18978000600 is an apocalyptic number.

18978000600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18978000600 is an abundant number, since it is smaller than the sum of its proper divisors (44379350520).

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

18978000600 is a wasteful number, since it uses less digits than its factorization.

18978000600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433109 (or 2433100 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 18978000600 in words is "eighteen billion, nine hundred seventy-eight million, six hundred", and thus it is an aban number.