18273964 has 12 divisors (see below), whose sum is σ = 32384800. Its totient is φ = 9021168.

The previous prime is 18273961. The next prime is 18273979. The reversal of 18273964 is 46937281.

It is not an unprimeable number, because it can be changed into a prime (18273961) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28599 + ... + 29230.

Almost surely, 2^18273964 is an apocalyptic number.

It is an amenable number.

18273964 is a deficient number, since it is larger than the sum of its proper divisors (14110836).

18273964 is a wasteful number, since it uses less digits than its factorization.

18273964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57912 (or 57910 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 18273964 is about 4274.8057265799. The cubic root of 18273964 is about 263.3970591202.

The spelling of 18273964 in words is "eighteen million, two hundred seventy-three thousand, nine hundred sixty-four".