20772593 has 2 divisors, whose sum is σ = 20772594. Its totient is φ = 20772592.

The previous prime is 20772581. The next prime is 20772599. The reversal of 20772593 is 39527702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 1129969 = 4432^2 + 1063^2 .

It is a cyclic number.

It is not a de Polignac number, because 20772593 - 2⁸ = 20772337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20772599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10386296 + 10386297.

It is an arithmetic number, because the mean of its divisors is an integer number (10386297).

Almost surely, 2^20772593 is an apocalyptic number.

It is an amenable number.

20772593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20772593 is an equidigital number, since it uses as much as digits as its factorization.

20772593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 20772593 is about 4557.6960188235. The cubic root of 20772593 is about 274.8929302192.

The spelling of 20772593 in words is "twenty million, seven hundred seventy-two thousand, five hundred ninety-three".