22427993 has 4 divisors (see below), whose sum is σ = 25632000. Its totient is φ = 19223988.

The previous prime is 22427989. The next prime is 22428001. The reversal of 22427993 is 39972422.

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 not a de Polignac number, because 22427993 - 2² = 22427989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22427963) 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, 1601993 + ... + 1602006.

It is an arithmetic number, because the mean of its divisors is an integer number (6408000).

Almost surely, 2^22427993 is an apocalyptic number.

It is an amenable number.

22427993 is a deficient number, since it is larger than the sum of its proper divisors (3204007).

22427993 is an equidigital number, since it uses as much as digits as its factorization.

22427993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3204006.

The product of its digits is 54432, while the sum is 38.

The square root of 22427993 is about 4735.8202035128. The cubic root of 22427993 is about 282.0093260165.

The spelling of 22427993 in words is "twenty-two million, four hundred twenty-seven thousand, nine hundred ninety-three".