18939064 has 16 divisors (see below), whose sum is σ = 35670600. Its totient is φ = 9426912.

The previous prime is 18939061. The next prime is 18939083. The reversal of 18939064 is 46093981.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18939061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3399 + ... + 7030.

Almost surely, 2^18939064 is an apocalyptic number.

It is an amenable number.

18939064 is a deficient number, since it is larger than the sum of its proper divisors (16731536).

18939064 is a wasteful number, since it uses less digits than its factorization.

18939064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10662 (or 10658 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18939064 is about 4351.9034915770. The cubic root of 18939064 is about 266.5545931826.

The spelling of 18939064 in words is "eighteen million, nine hundred thirty-nine thousand, sixty-four".