20577092377 has 2 divisors, whose sum is σ = 20577092378. Its totient is φ = 20577092376.

The previous prime is 20577092351. The next prime is 20577092441. The reversal of 20577092377 is 77329077502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13908900096 + 6668192281 = 117936^2 + 81659^2 .

It is a cyclic number.

It is not a de Polignac number, because 20577092377 - 2¹⁵ = 20577059609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20577092377.

It is not a weakly prime, because it can be changed into another prime (20577096377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10288546188 + 10288546189.

It is an arithmetic number, because the mean of its divisors is an integer number (10288546189).

Almost surely, 2^20577092377 is an apocalyptic number.

It is an amenable number.

20577092377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20577092377 is an equidigital number, since it uses as much as digits as its factorization.

20577092377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296540, while the sum is 49.

The spelling of 20577092377 in words is "twenty billion, five hundred seventy-seven million, ninety-two thousand, three hundred seventy-seven".