18942464 has 20 divisors (see below), whose sum is σ = 37848954. Its totient is φ = 9470976.

The previous prime is 18942463. The next prime is 18942479. The reversal of 18942464 is 46424981.

It can be written as a sum of positive squares in only one way, i.e., 14137600 + 4804864 = 3760^2 + 2192^2 .

It is not an unprimeable number, because it can be changed into a prime (18942461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17987 + ... + 19010.

Almost surely, 2^18942464 is an apocalyptic number.

It is an amenable number.

18942464 is a deficient number, since it is larger than the sum of its proper divisors (18906490).

18942464 is an frugal number, since it uses more digits than its factorization.

18942464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37015 (or 36999 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 18942464 is about 4352.2941077092. The cubic root of 18942464 is about 266.5705431329.

The spelling of 18942464 in words is "eighteen million, nine hundred forty-two thousand, four hundred sixty-four".