20577113 has 4 divisors (see below), whose sum is σ = 20586420. Its totient is φ = 20567808.

The previous prime is 20577103. The next prime is 20577119. The reversal of 20577113 is 31177502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31177502 = 2 ⋅15588751.

It can be written as a sum of positive squares in 2 ways, for example, as 8832784 + 11744329 = 2972^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 20577113 - 2¹⁶ = 20511577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20577119) 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, 773 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (5146605).

Almost surely, 2^20577113 is an apocalyptic number.

It is an amenable number.

20577113 is a deficient number, since it is larger than the sum of its proper divisors (9307).

20577113 is an equidigital number, since it uses as much as digits as its factorization.

20577113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9306.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 20577113 is about 4536.2002821745. The cubic root of 20577113 is about 274.0279199709.

The spelling of 20577113 in words is "twenty million, five hundred seventy-seven thousand, one hundred thirteen".