18725130 has 24 divisors (see below), whose sum is σ = 48685572. Its totient is φ = 4993344.

The previous prime is 18725123. The next prime is 18725131. The reversal of 18725130 is 3152781.

It can be written as a sum of positive squares in 2 ways, for example, as 17114769 + 1610361 = 4137^2 + 1269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18725094 and 18725103.

It is not an unprimeable number, because it can be changed into a prime (18725131) 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, 103939 + ... + 104118.

Almost surely, 2^18725130 is an apocalyptic number.

18725130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18725130 is an abundant number, since it is smaller than the sum of its proper divisors (29960442).

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

18725130 is a wasteful number, since it uses less digits than its factorization.

18725130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208070 (or 208067 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 18725130 is about 4327.2543257821. The cubic root of 18725130 is about 265.5471311309.

The spelling of 18725130 in words is "eighteen million, seven hundred twenty-five thousand, one hundred thirty".