22420577 has 4 divisors (see below), whose sum is σ = 22452480. Its totient is φ = 22388676.

The previous prime is 22420571. The next prime is 22420579. The reversal of 22420577 is 77502422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22420577 - 2¹² = 22416481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22420571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14873 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (5613120).

Almost surely, 2^22420577 is an apocalyptic number.

It is an amenable number.

22420577 is a deficient number, since it is larger than the sum of its proper divisors (31903).

22420577 is an equidigital number, since it uses as much as digits as its factorization.

22420577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31902.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 22420577 is about 4735.0371698647. The cubic root of 22420577 is about 281.9782396904.

Adding to 22420577 its reverse (77502422), we get a palindrome (99922999).

The spelling of 22420577 in words is "twenty-two million, four hundred twenty thousand, five hundred seventy-seven".