22731993 has 24 divisors (see below), whose sum is σ = 33908160. Its totient is φ = 14666400.

The previous prime is 22731991. The next prime is 22732001. The reversal of 22731993 is 39913722.

It is not a de Polignac number, because 22731993 - 2¹ = 22731991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22731991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58243 + ... + 58631.

It is an arithmetic number, because the mean of its divisors is an integer number (1412840).

Almost surely, 2^22731993 is an apocalyptic number.

It is an amenable number.

22731993 is a deficient number, since it is larger than the sum of its proper divisors (11176167).

22731993 is a wasteful number, since it uses less digits than its factorization.

22731993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589 (or 586 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 22731993 is about 4767.8079869055. The cubic root of 22731993 is about 283.2777762657.

The spelling of 22731993 in words is "twenty-two million, seven hundred thirty-one thousand, nine hundred ninety-three".