22720753 has 4 divisors (see below), whose sum is σ = 24786288. Its totient is φ = 20655220.

The previous prime is 22720741. The next prime is 22720759. The reversal of 22720753 is 35702722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22720753 is a prime.

It is a super-3 number, since 3×22720753³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22720759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1032751 + ... + 1032772.

It is an arithmetic number, because the mean of its divisors is an integer number (6196572).

Almost surely, 2^22720753 is an apocalyptic number.

It is an amenable number.

22720753 is a deficient number, since it is larger than the sum of its proper divisors (2065535).

22720753 is a wasteful number, since it uses less digits than its factorization.

22720753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065534.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 22720753 is about 4766.6291024161. The cubic root of 22720753 is about 283.2310789796.

The spelling of 22720753 in words is "twenty-two million, seven hundred twenty thousand, seven hundred fifty-three".