22420537 has 8 divisors (see below), whose sum is σ = 23059080. Its totient is φ = 21790080.

The previous prime is 22420529. The next prime is 22420547. The reversal of 22420537 is 73502422.

It can be written as a sum of positive squares in 4 ways, for example, as 8737936 + 13682601 = 2956^2 + 3699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22420537 - 2³ = 22420529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22420507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3837 + ... + 7717.

It is an arithmetic number, because the mean of its divisors is an integer number (2882385).

Almost surely, 2^22420537 is an apocalyptic number.

It is an amenable number.

22420537 is a deficient number, since it is larger than the sum of its proper divisors (638543).

22420537 is a wasteful number, since it uses less digits than its factorization.

22420537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 22420537 is about 4735.0329460311. The cubic root of 22420537 is about 281.9780720002.

Adding to 22420537 its reverse (73502422), we get a palindrome (95922959).

The spelling of 22420537 in words is "twenty-two million, four hundred twenty thousand, five hundred thirty-seven".