18064436 has 48 divisors (see below), whose sum is σ = 35973840. Its totient is φ = 7879680.

The previous prime is 18064427. The next prime is 18064441. The reversal of 18064436 is 63446081.

It can be written as a sum of positive squares in 8 ways, for example, as 1936 + 18062500 = 44^2 + 4250^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78770 + ... + 78998.

It is an arithmetic number, because the mean of its divisors is an integer number (749455).

Almost surely, 2^18064436 is an apocalyptic number.

It is an amenable number.

18064436 is a deficient number, since it is larger than the sum of its proper divisors (17909404).

18064436 is a wasteful number, since it uses less digits than its factorization.

18064436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 18064436 is about 4250.2277586031. The cubic root of 18064436 is about 262.3864893958.

The spelling of 18064436 in words is "eighteen million, sixty-four thousand, four hundred thirty-six".