22720373 has 4 divisors (see below), whose sum is σ = 24468108. Its totient is φ = 20972640.

The previous prime is 22720363. The next prime is 22720391. The reversal of 22720373 is 37302722.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37302722 = 2 ⋅18651361.

It can be written as a sum of positive squares in 2 ways, for example, as 13490929 + 9229444 = 3673^2 + 3038^2 .

It is not a de Polignac number, because 22720373 - 2¹⁰ = 22719349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22720363) 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, 873848 + ... + 873873.

It is an arithmetic number, because the mean of its divisors is an integer number (6117027).

Almost surely, 2^22720373 is an apocalyptic number.

It is an amenable number.

22720373 is a deficient number, since it is larger than the sum of its proper divisors (1747735).

22720373 is a wasteful number, since it uses less digits than its factorization.

22720373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747734.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 22720373 is about 4766.5892417954. The cubic root of 22720373 is about 283.2294999766.

The spelling of 22720373 in words is "twenty-two million, seven hundred twenty thousand, three hundred seventy-three".