20885977 has 8 divisors (see below), whose sum is σ = 24226496. Its totient is φ = 17634672.

The previous prime is 20885939. The next prime is 20885981. The reversal of 20885977 is 77958802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20885977 - 2⁷ = 20885849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20885927) 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, 21798 + ... + 22735.

It is an arithmetic number, because the mean of its divisors is an integer number (3028312).

Almost surely, 2^20885977 is an apocalyptic number.

It is an amenable number.

20885977 is a deficient number, since it is larger than the sum of its proper divisors (3340519).

20885977 is an equidigital number, since it uses as much as digits as its factorization.

20885977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44607.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 20885977 is about 4570.1178321789. The cubic root of 20885977 is about 275.3921765407.

The spelling of 20885977 in words is "twenty million, eight hundred eighty-five thousand, nine hundred seventy-seven".