22047047 has 24 divisors (see below), whose sum is σ = 25727520. Its totient is φ = 18849600.

The previous prime is 22047037. The next prime is 22047059. The reversal of 22047047 is 74074022.

It is a de Polignac number, because none of the positive numbers 2^k-22047047 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22047007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213998 + ... + 214100.

It is an arithmetic number, because the mean of its divisors is an integer number (1071980).

Almost surely, 2^22047047 is an apocalyptic number.

22047047 is a deficient number, since it is larger than the sum of its proper divisors (3680473).

22047047 is a wasteful number, since it uses less digits than its factorization.

22047047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 22047047 is about 4695.4283084720. The cubic root of 22047047 is about 280.4035295577.

The spelling of 22047047 in words is "twenty-two million, forty-seven thousand, forty-seven".