22720473 has 16 divisors (see below), whose sum is σ = 33733440. Its totient is φ = 15113952.

The previous prime is 22720463. The next prime is 22720499. The reversal of 22720473 is 37402722.

It is not a de Polignac number, because 22720473 - 2⁴ = 22720457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22720463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23365 + ... + 24317.

It is an arithmetic number, because the mean of its divisors is an integer number (2108340).

Almost surely, 2^22720473 is an apocalyptic number.

It is an amenable number.

22720473 is a deficient number, since it is larger than the sum of its proper divisors (11012967).

22720473 is an equidigital number, since it uses as much as digits as its factorization.

22720473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1839 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 22720473 is about 4766.5997314648. The cubic root of 22720473 is about 283.2299155054.

The spelling of 22720473 in words is "twenty-two million, seven hundred twenty thousand, four hundred seventy-three".