18372969 has 12 divisors (see below), whose sum is σ = 26640900. Its totient is φ = 12201504.

The previous prime is 18372967. The next prime is 18372973. The reversal of 18372969 is 96927381.

It can be written as a sum of positive squares in 2 ways, for example, as 632025 + 17740944 = 795^2 + 4212^2 .

It is not a de Polignac number, because 18372969 - 2¹ = 18372967 is a prime.

It is a super-2 number, since 2×18372969² = 675131979749922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18372967) 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 11 ways as a sum of consecutive naturals, for example, 1374 + ... + 6215.

It is an arithmetic number, because the mean of its divisors is an integer number (2220075).

Almost surely, 2^18372969 is an apocalyptic number.

It is an amenable number.

18372969 is a deficient number, since it is larger than the sum of its proper divisors (8267931).

18372969 is a wasteful number, since it uses less digits than its factorization.

18372969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864 (or 7861 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 18372969 is about 4286.3701426732. The cubic root of 18372969 is about 263.8718817052.

The spelling of 18372969 in words is "eighteen million, three hundred seventy-two thousand, nine hundred sixty-nine".