22551020 has 24 divisors (see below), whose sum is σ = 48027168. Its totient is φ = 8892800.

The previous prime is 22551013. The next prime is 22551059. The reversal of 22551020 is 2015522.

It is a self number, because there is not a number n which added to its sum of digits gives 22551020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6521 + ... + 9360.

It is an arithmetic number, because the mean of its divisors is an integer number (2001132).

Almost surely, 2^22551020 is an apocalyptic number.

22551020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22551020 is an abundant number, since it is smaller than the sum of its proper divisors (25476148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22551020 is a wasteful number, since it uses less digits than its factorization.

22551020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15961 (or 15959 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22551020 is about 4748.7914251944. The cubic root of 22551020 is about 282.5240327272.

Adding to 22551020 its reverse (2015522), we get a palindrome (24566542).

The spelling of 22551020 in words is "twenty-two million, five hundred fifty-one thousand, twenty".