20176990 has 32 divisors (see below), whose sum is σ = 37208160. Its totient is φ = 7876224.

The previous prime is 20176987. The next prime is 20176991. The reversal of 20176990 is 9967102.

It is a super-2 number, since 2×20176990² = 814221850920200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20176991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116544 + ... + 116716.

It is an arithmetic number, because the mean of its divisors is an integer number (1162755).

Almost surely, 2^20176990 is an apocalyptic number.

20176990 is a deficient number, since it is larger than the sum of its proper divisors (17031170).

20176990 is a wasteful number, since it uses less digits than its factorization.

20176990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20176990 is about 4491.8804525499. The cubic root of 20176990 is about 272.2401192053.

The spelling of 20176990 in words is "twenty million, one hundred seventy-six thousand, nine hundred ninety".