20164988 has 12 divisors (see below), whose sum is σ = 35405832. Its totient is φ = 10049040.

The previous prime is 20164981. The next prime is 20165003. The reversal of 20164988 is 88946102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164981) 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, 6983 + ... + 9438.

It is an arithmetic number, because the mean of its divisors is an integer number (2950486).

Almost surely, 2^20164988 is an apocalyptic number.

It is an amenable number.

20164988 is a deficient number, since it is larger than the sum of its proper divisors (15240844).

20164988 is a wasteful number, since it uses less digits than its factorization.

20164988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16732 (or 16730 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 20164988 is about 4490.5442877228. The cubic root of 20164988 is about 272.1861290910.

The spelling of 20164988 in words is "twenty million, one hundred sixty-four thousand, nine hundred eighty-eight".