20575977 has 8 divisors (see below), whose sum is σ = 27474720. Its totient is φ = 13697280.

The previous prime is 20575969. The next prime is 20575981. The reversal of 20575977 is 77957502.

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

It is not a de Polignac number, because 20575977 - 2³ = 20575969 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20575937) 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, 2424 + ... + 6857.

It is an arithmetic number, because the mean of its divisors is an integer number (3434340).

Almost surely, 2^20575977 is an apocalyptic number.

It is an amenable number.

20575977 is a deficient number, since it is larger than the sum of its proper divisors (6898743).

20575977 is an equidigital number, since it uses as much as digits as its factorization.

20575977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023.

The product of its (nonzero) digits is 154350, while the sum is 42.

The square root of 20575977 is about 4536.0750655164. The cubic root of 20575977 is about 274.0228771280.

The spelling of 20575977 in words is "twenty million, five hundred seventy-five thousand, nine hundred seventy-seven".