18713400 has 48 divisors (see below), whose sum is σ = 58013400. Its totient is φ = 4990080.

The previous prime is 18713393. The next prime is 18713411. The reversal of 18713400 is 431781.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 14995 + ... + 16194.

Almost surely, 2^18713400 is an apocalyptic number.

18713400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18713400 is an abundant number, since it is smaller than the sum of its proper divisors (39300000).

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

18713400 is a wasteful number, since it uses less digits than its factorization.

18713400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31208 (or 31199 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 18713400 is about 4325.8987505488. The cubic root of 18713400 is about 265.4916705726.

The spelling of 18713400 in words is "eighteen million, seven hundred thirteen thousand, four hundred".