22620989 has 4 divisors (see below), whose sum is σ = 22645824. Its totient is φ = 22596156.

The previous prime is 22620973. The next prime is 22621003. The reversal of 22620989 is 98902622.

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 22620989 - 2⁴ = 22620973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22620929) 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, 10997 + ... + 12890.

It is an arithmetic number, because the mean of its divisors is an integer number (5661456).

Almost surely, 2^22620989 is an apocalyptic number.

It is an amenable number.

22620989 is a deficient number, since it is larger than the sum of its proper divisors (24835).

22620989 is an equidigital number, since it uses as much as digits as its factorization.

22620989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24834.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 22620989 is about 4756.1527519625. The cubic root of 22620989 is about 282.8159266131.

The spelling of 22620989 in words is "twenty-two million, six hundred twenty thousand, nine hundred eighty-nine".