22520813 has 8 divisors (see below), whose sum is σ = 26224128. Its totient is φ = 18939024.

The previous prime is 22520809. The next prime is 22520821. The reversal of 22520813 is 31802522.

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 22520813 - 2² = 22520809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22520803) 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, 29981 + ... + 30722.

It is an arithmetic number, because the mean of its divisors is an integer number (3278016).

Almost surely, 2^22520813 is an apocalyptic number.

It is an amenable number.

22520813 is a deficient number, since it is larger than the sum of its proper divisors (3703315).

22520813 is an equidigital number, since it uses as much as digits as its factorization.

22520813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60763.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 22520813 is about 4745.6098659709. The cubic root of 22520813 is about 282.3978297615.

The spelling of 22520813 in words is "twenty-two million, five hundred twenty thousand, eight hundred thirteen".