18039464 has 8 divisors (see below), whose sum is σ = 33824010. Its totient is φ = 9019728.

The previous prime is 18039449. The next prime is 18039491. The reversal of 18039464 is 46493081.

It can be written as a sum of positive squares in only one way, i.e., 10432900 + 7606564 = 3230^2 + 2758^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18039464² = 650844522814592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127459 + ... + 1127474.

Almost surely, 2^18039464 is an apocalyptic number.

It is an amenable number.

18039464 is a deficient number, since it is larger than the sum of its proper divisors (15784546).

18039464 is a wasteful number, since it uses less digits than its factorization.

18039464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254939 (or 2254935 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 18039464 is about 4247.2890177147. The cubic root of 18039464 is about 262.2655272835.

The spelling of 18039464 in words is "eighteen million, thirty-nine thousand, four hundred sixty-four".