18364040 has 32 divisors (see below), whose sum is σ = 41753880. Its totient is φ = 7268352.

The previous prime is 18364039. The next prime is 18364057. The reversal of 18364040 is 4046381.

It can be written as a sum of positive squares in 4 ways, for example, as 11383876 + 6980164 = 3374^2 + 2642^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1514 + ... + 6246.

Almost surely, 2^18364040 is an apocalyptic number.

18364040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18364040 is an abundant number, since it is smaller than the sum of its proper divisors (23389840).

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

18364040 is a wasteful number, since it uses less digits than its factorization.

18364040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 18364040 is about 4285.3284588232. The cubic root of 18364040 is about 263.8291287926.

The spelling of 18364040 in words is "eighteen million, three hundred sixty-four thousand, forty".