20577213 has 16 divisors (see below), whose sum is σ = 30603840. Its totient is φ = 13664592.

The previous prime is 20577131. The next prime is 20577229. The reversal of 20577213 is 31277502.

It is not a de Polignac number, because 20577213 - 2⁹ = 20576701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6295 + ... + 8987.

It is an arithmetic number, because the mean of its divisors is an integer number (1912740).

Almost surely, 2^20577213 is an apocalyptic number.

It is an amenable number.

20577213 is a deficient number, since it is larger than the sum of its proper divisors (10026627).

20577213 is a wasteful number, since it uses less digits than its factorization.

20577213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20577213 is about 4536.2113046021. The cubic root of 20577213 is about 274.0283638743.

The spelling of 20577213 in words is "twenty million, five hundred seventy-seven thousand, two hundred thirteen".