22263993 has 6 divisors (see below), whose sum is σ = 32159114. Its totient is φ = 14842656.

The previous prime is 22263979. The next prime is 22264001. The reversal of 22263993 is 39936222.

It can be written as a sum of positive squares in only one way, i.e., 15776784 + 6487209 = 3972^2 + 2547^2 .

It is not a de Polignac number, because 22263993 - 2⁵ = 22263961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22262993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1236880 + ... + 1236897.

Almost surely, 2^22263993 is an apocalyptic number.

It is an amenable number.

22263993 is a deficient number, since it is larger than the sum of its proper divisors (9895121).

22263993 is a wasteful number, since it uses less digits than its factorization.

22263993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473783 (or 2473780 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 22263993 is about 4718.4735879307. The cubic root of 22263993 is about 281.3202657031.

The spelling of 22263993 in words is "twenty-two million, two hundred sixty-three thousand, nine hundred ninety-three".