18725720 has 32 divisors (see below), whose sum is σ = 45375120. Its totient is φ = 6913920.

The previous prime is 18725711. The next prime is 18725723. The reversal of 18725720 is 2752781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18725723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17486 + ... + 18525.

Almost surely, 2^18725720 is an apocalyptic number.

18725720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18725720 is an abundant number, since it is smaller than the sum of its proper divisors (26649400).

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

18725720 is a wasteful number, since it uses less digits than its factorization.

18725720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36035 (or 36031 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18725720 is about 4327.3224978039. The cubic root of 18725720 is about 265.5499200953.

The spelling of 18725720 in words is "eighteen million, seven hundred twenty-five thousand, seven hundred twenty".