22520489977 has 2 divisors, whose sum is σ = 22520489978. Its totient is φ = 22520489976.

The previous prime is 22520489939. The next prime is 22520489987. The reversal of 22520489977 is 77998402522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21992593401 + 527896576 = 148299^2 + 22976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22520489977 is a prime.

It is not a weakly prime, because it can be changed into another prime (22520489987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11260244988 + 11260244989.

It is an arithmetic number, because the mean of its divisors is an integer number (11260244989).

Almost surely, 2^22520489977 is an apocalyptic number.

It is an amenable number.

22520489977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22520489977 is an equidigital number, since it uses as much as digits as its factorization.

22520489977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 22520489977 in words is "twenty-two billion, five hundred twenty million, four hundred eighty-nine thousand, nine hundred seventy-seven".