18729768 has 32 divisors (see below), whose sum is σ = 47916000. Its totient is φ = 6097728.

The previous prime is 18729761. The next prime is 18729769. The reversal of 18729768 is 86792781.

It is not an unprimeable number, because it can be changed into a prime (18729761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8043 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (1497375).

Almost surely, 2^18729768 is an apocalyptic number.

It is an amenable number.

18729768 is an abundant number, since it is smaller than the sum of its proper divisors (29186232).

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

18729768 is a wasteful number, since it uses less digits than its factorization.

18729768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18201 (or 18197 counting only the distinct ones).

The product of its digits is 338688, while the sum is 48.

The square root of 18729768 is about 4327.7901982421. The cubic root of 18729768 is about 265.5690536475.

The spelling of 18729768 in words is "eighteen million, seven hundred twenty-nine thousand, seven hundred sixty-eight".