22739321 has 4 divisors (see below), whose sum is σ = 24806544. Its totient is φ = 20672100.

The previous prime is 22739317. The next prime is 22739323. The reversal of 22739321 is 12393722.

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 a cyclic number.

It is not a de Polignac number, because 22739321 - 2² = 22739317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22739323) 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, 1033595 + ... + 1033616.

It is an arithmetic number, because the mean of its divisors is an integer number (6201636).

Almost surely, 2^22739321 is an apocalyptic number.

It is an amenable number.

22739321 is a deficient number, since it is larger than the sum of its proper divisors (2067223).

22739321 is a wasteful number, since it uses less digits than its factorization.

22739321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067222.

The product of its digits is 4536, while the sum is 29.

The square root of 22739321 is about 4768.5764123059. The cubic root of 22739321 is about 283.3082126133.

The spelling of 22739321 in words is "twenty-two million, seven hundred thirty-nine thousand, three hundred twenty-one".