18870025 has 12 divisors (see below), whose sum is σ = 23730624. Its totient is φ = 14882000.

The previous prime is 18870023. The next prime is 18870043. The reversal of 18870025 is 52007881.

It is not a de Polignac number, because 18870025 - 2¹ = 18870023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18870023) 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, 3541 + ... + 7090.

It is an arithmetic number, because the mean of its divisors is an integer number (1977552).

Almost surely, 2^18870025 is an apocalyptic number.

It is an amenable number.

18870025 is a deficient number, since it is larger than the sum of its proper divisors (4860599).

18870025 is a wasteful number, since it uses less digits than its factorization.

18870025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712 (or 10707 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 18870025 is about 4343.9642033516. The cubic root of 18870025 is about 266.2303063159.

The spelling of 18870025 in words is "eighteen million, eight hundred seventy thousand, twenty-five".