18472400 has 30 divisors (see below), whose sum is σ = 44380902. Its totient is φ = 7388800.

The previous prime is 18472393. The next prime is 18472411. The reversal of 18472400 is 427481.

It can be written as a sum of positive squares in 3 ways, for example, as 2917264 + 15555136 = 1708^2 + 3944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18472400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22691 + ... + 23490.

Almost surely, 2^18472400 is an apocalyptic number.

18472400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18472400 is an abundant number, since it is smaller than the sum of its proper divisors (25908502).

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

18472400 is a wasteful number, since it uses less digits than its factorization.

18472400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46199 (or 46188 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 18472400 is about 4297.9530011390. The cubic root of 18472400 is about 264.3470336689.

Adding to 18472400 its reverse (427481), we get a palindrome (18899881).

The spelling of 18472400 in words is "eighteen million, four hundred seventy-two thousand, four hundred".