22047639 has 16 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 13970528.

The previous prime is 22047637. The next prime is 22047673. The reversal of 22047639 is 93674022.

It is a cyclic number.

It is not a de Polignac number, because 22047639 - 2¹ = 22047637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047631) 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 15 ways as a sum of consecutive naturals, for example, 11014 + ... + 12860.

It is an arithmetic number, because the mean of its divisors is an integer number (1929312).

Almost surely, 2^22047639 is an apocalyptic number.

22047639 is a deficient number, since it is larger than the sum of its proper divisors (8821353).

22047639 is a wasteful number, since it uses less digits than its factorization.

22047639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 22047639 is about 4695.4913480913. The cubic root of 22047639 is about 280.4060393028.

The spelling of 22047639 in words is "twenty-two million, forty-seven thousand, six hundred thirty-nine".