22118977 has 2 divisors, whose sum is σ = 22118978. Its totient is φ = 22118976.

The previous prime is 22118969. The next prime is 22118981. The reversal of 22118977 is 77981122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 876096 = 4609^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 22118977 - 2³ = 22118969 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22118947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11059488 + 11059489.

It is an arithmetic number, because the mean of its divisors is an integer number (11059489).

Almost surely, 2^22118977 is an apocalyptic number.

It is an amenable number.

22118977 is a deficient number, since it is larger than the sum of its proper divisors (1).

22118977 is an equidigital number, since it uses as much as digits as its factorization.

22118977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 37.

The square root of 22118977 is about 4703.0816493019. The cubic root of 22118977 is about 280.7081437590.

The spelling of 22118977 in words is "twenty-two million, one hundred eighteen thousand, nine hundred seventy-seven".