22474639 has 4 divisors (see below), whose sum is σ = 24517800. Its totient is φ = 20431480.

The previous prime is 22474633. The next prime is 22474643. The reversal of 22474639 is 93647422.

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 22474639 - 2⁵ = 22474607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22474598 and 22474607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22474633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021564 + ... + 1021585.

It is an arithmetic number, because the mean of its divisors is an integer number (6129450).

Almost surely, 2^22474639 is an apocalyptic number.

22474639 is a deficient number, since it is larger than the sum of its proper divisors (2043161).

22474639 is a wasteful number, since it uses less digits than its factorization.

22474639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043160.

The product of its digits is 72576, while the sum is 37.

The square root of 22474639 is about 4740.7424524013. The cubic root of 22474639 is about 282.2046993883.

It can be divided in two parts, 224746 and 39, that added together give a triangular number (224785 = T₆₇₀).

The spelling of 22474639 in words is "twenty-two million, four hundred seventy-four thousand, six hundred thirty-nine".