22590020 has 12 divisors (see below), whose sum is σ = 47439084. Its totient is φ = 9036000.

The previous prime is 22590019. The next prime is 22590023. The reversal of 22590020 is 2009522.

It can be written as a sum of positive squares in 2 ways, for example, as 6461764 + 16128256 = 2542^2 + 4016^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1129501 = 22590020 / (2 + 2 + 5 + 9 + 0 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 22589974 and 22590001.

It is not an unprimeable number, because it can be changed into a prime (22590023) 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, 564731 + ... + 564770.

It is an arithmetic number, because the mean of its divisors is an integer number (3953257).

Almost surely, 2^22590020 is an apocalyptic number.

22590020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22590020 is an abundant number, since it is smaller than the sum of its proper divisors (24849064).

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

22590020 is a wasteful number, since it uses less digits than its factorization.

22590020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129510 (or 1129508 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 22590020 is about 4752.8959593073. The cubic root of 22590020 is about 282.6868057276.

Adding to 22590020 its reverse (2009522), we get a palindrome (24599542).

The spelling of 22590020 in words is "twenty-two million, five hundred ninety thousand, twenty".