18725380 has 24 divisors (see below), whose sum is σ = 39416832. Its totient is φ = 7472352.

The previous prime is 18725363. The next prime is 18725383. The reversal of 18725380 is 8352781.

It is a super-2 number, since 2×18725380² = 701279712288800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18725383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10429 + ... + 12091.

It is an arithmetic number, because the mean of its divisors is an integer number (1642368).

Almost surely, 2^18725380 is an apocalyptic number.

18725380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18725380 is an abundant number, since it is smaller than the sum of its proper divisors (20691452).

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

18725380 is a wasteful number, since it uses less digits than its factorization.

18725380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 18725380 is about 4327.2832123632. The cubic root of 18725380 is about 265.5483129026.

The spelling of 18725380 in words is "eighteen million, seven hundred twenty-five thousand, three hundred eighty".