18713536400 has 60 divisors (see below), whose sum is σ = 48417690132. Its totient is φ = 6909611520.

The previous prime is 18713536393. The next prime is 18713536409. The reversal of 18713536400 is 463531781.

It can be written as a sum of positive squares in 6 ways, for example, as 3632713984 + 15080822416 = 60272^2 + 122804^2 .

It is not an unprimeable number, because it can be changed into a prime (18713536409) 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, 1794179 + ... + 1804578.

Almost surely, 2^18713536400 is an apocalyptic number.

18713536400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18713536400 is an abundant number, since it is smaller than the sum of its proper divisors (29704153732).

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

18713536400 is a wasteful number, since it uses less digits than its factorization.

18713536400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598788 (or 3598777 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 18713536400 in words is "eighteen billion, seven hundred thirteen million, five hundred thirty-six thousand, four hundred".