22470820 has 12 divisors (see below), whose sum is σ = 47188764. Its totient is φ = 8988320.

The previous prime is 22470769. The next prime is 22470857. The reversal of 22470820 is 2807422.

It can be written as a sum of positive squares in 2 ways, for example, as 2328676 + 20142144 = 1526^2 + 4488^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561751 + ... + 561790.

It is an arithmetic number, because the mean of its divisors is an integer number (3932397).

Almost surely, 2^22470820 is an apocalyptic number.

22470820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22470820 is an abundant number, since it is smaller than the sum of its proper divisors (24717944).

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

22470820 is a wasteful number, since it uses less digits than its factorization.

22470820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123550 (or 1123548 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 22470820 is about 4740.3396502782. The cubic root of 22470820 is about 282.1887139510.

The spelling of 22470820 in words is "twenty-two million, four hundred seventy thousand, eight hundred twenty".