22491839 has 4 divisors (see below), whose sum is σ = 23675640. Its totient is φ = 21308040.

The previous prime is 22491829. The next prime is 22491857. The reversal of 22491839 is 93819422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22491839 - 2¹² = 22487743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22491809) 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, 591872 + ... + 591909.

It is an arithmetic number, because the mean of its divisors is an integer number (5918910).

Almost surely, 2^22491839 is an apocalyptic number.

22491839 is a deficient number, since it is larger than the sum of its proper divisors (1183801).

22491839 is a wasteful number, since it uses less digits than its factorization.

22491839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183800.

The product of its digits is 31104, while the sum is 38.

The square root of 22491839 is about 4742.5561673005. The cubic root of 22491839 is about 282.2766721144.

The spelling of 22491839 in words is "twenty-two million, four hundred ninety-one thousand, eight hundred thirty-nine".