18949964 has 24 divisors (see below), whose sum is σ = 36288000. Its totient is φ = 8587280.

The previous prime is 18949949. The next prime is 18949993. The reversal of 18949964 is 46994981.

It is a happy number.

It is a super-2 number, since 2×18949964² = 718202271202592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25997 + ... + 26715.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^18949964 is an apocalyptic number.

It is an amenable number.

18949964 is a deficient number, since it is larger than the sum of its proper divisors (17338036).

18949964 is a wasteful number, since it uses less digits than its factorization.

18949964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333 (or 1331 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 18949964 is about 4353.1556370063. The cubic root of 18949964 is about 266.6057200995.

The spelling of 18949964 in words is "eighteen million, nine hundred forty-nine thousand, nine hundred sixty-four".