22373721 has 12 divisors (see below), whose sum is σ = 32361472. Its totient is φ = 14895576.

The previous prime is 22373719. The next prime is 22373737. The reversal of 22373721 is 12737322.

It is a happy number.

It is not a de Polignac number, because 22373721 - 2¹ = 22373719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22373321) 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 11 ways as a sum of consecutive naturals, for example, 8640 + ... + 10926.

Almost surely, 2^22373721 is an apocalyptic number.

It is an amenable number.

22373721 is a deficient number, since it is larger than the sum of its proper divisors (9987751).

22373721 is a wasteful number, since it uses less digits than its factorization.

22373721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380 (or 3377 counting only the distinct ones).

The product of its digits is 3528, while the sum is 27.

The square root of 22373721 is about 4730.0867856732. The cubic root of 22373721 is about 281.7816704536.

The spelling of 22373721 in words is "twenty-two million, three hundred seventy-three thousand, seven hundred twenty-one".