22572020 has 12 divisors (see below), whose sum is σ = 47401284. Its totient is φ = 9028800.

The previous prime is 22571987. The next prime is 22572029. The reversal of 22572020 is 2027522.

It can be written as a sum of positive squares in 2 ways, for example, as 3247204 + 19324816 = 1802^2 + 4396^2 .

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: 1128601 = 22572020 / (2 + 2 + 5 + 7 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 22571983 and 22572001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22572029) 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, 564281 + ... + 564320.

It is an arithmetic number, because the mean of its divisors is an integer number (3950107).

Almost surely, 2^22572020 is an apocalyptic number.

22572020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22572020 is an abundant number, since it is smaller than the sum of its proper divisors (24829264).

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

22572020 is a wasteful number, since it uses less digits than its factorization.

22572020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128610 (or 1128608 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 22572020 is about 4751.0019995786. The cubic root of 22572020 is about 282.6117030261.

Adding to 22572020 its reverse (2027522), we get a palindrome (24599542).

The spelling of 22572020 in words is "twenty-two million, five hundred seventy-two thousand, twenty".