22520977 has 4 divisors (see below), whose sum is σ = 22637860. Its totient is φ = 22404096.

The previous prime is 22520969. The next prime is 22520989. The reversal of 22520977 is 77902522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14814801 + 7706176 = 3849^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 22520977 - 2³ = 22520969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22520957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58152 + ... + 58537.

It is an arithmetic number, because the mean of its divisors is an integer number (5659465).

Almost surely, 2^22520977 is an apocalyptic number.

It is an amenable number.

22520977 is a deficient number, since it is larger than the sum of its proper divisors (116883).

22520977 is a wasteful number, since it uses less digits than its factorization.

22520977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116882.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 22520977 is about 4745.6271450673. The cubic root of 22520977 is about 282.3985152479.

The spelling of 22520977 in words is "twenty-two million, five hundred twenty thousand, nine hundred seventy-seven".