20880077377 has 2 divisors, whose sum is σ = 20880077378. Its totient is φ = 20880077376.

The previous prime is 20880077359. The next prime is 20880077389. The reversal of 20880077377 is 77377008802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18866670736 + 2013406641 = 137356^2 + 44871^2 .

It is a cyclic number.

It is not a de Polignac number, because 20880077377 - 2¹⁵ = 20880044609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20880077377.

It is not a weakly prime, because it can be changed into another prime (20880077357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10440038688 + 10440038689.

It is an arithmetic number, because the mean of its divisors is an integer number (10440038689).

Almost surely, 2^20880077377 is an apocalyptic number.

It is an amenable number.

20880077377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20880077377 is an equidigital number, since it uses as much as digits as its factorization.

20880077377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921984, while the sum is 49.

The spelling of 20880077377 in words is "twenty billion, eight hundred eighty million, seventy-seven thousand, three hundred seventy-seven".