18964920 has 64 divisors (see below), whose sum is σ = 61276320. Its totient is φ = 4667904.

The previous prime is 18964879. The next prime is 18964931. The reversal of 18964920 is 2946981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4519 + ... + 7638.

Almost surely, 2^18964920 is an apocalyptic number.

18964920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18964920 is an abundant number, since it is smaller than the sum of its proper divisors (42311400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18964920 is a wasteful number, since it uses less digits than its factorization.

18964920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12184 (or 12180 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 18964920 is about 4354.8731324804. The cubic root of 18964920 is about 266.6758399622.

The spelling of 18964920 in words is "eighteen million, nine hundred sixty-four thousand, nine hundred twenty".