22173642 has 16 divisors (see below), whose sum is σ = 49274880. Its totient is φ = 7391196.

The previous prime is 22173637. The next prime is 22173653. The reversal of 22173642 is 24637122.

22173642 is a `hidden beast` number, since 2 + 2 + 17 + 3 + 642 = 666.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 205258 + ... + 205365.

It is an arithmetic number, because the mean of its divisors is an integer number (3079680).

Almost surely, 2^22173642 is an apocalyptic number.

22173642 is an abundant number, since it is smaller than the sum of its proper divisors (27101238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22173642 is a wasteful number, since it uses less digits than its factorization.

22173642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410634 (or 410628 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 22173642 is about 4708.8896780451. The cubic root of 22173642 is about 280.9392015641.

The spelling of 22173642 in words is "twenty-two million, one hundred seventy-three thousand, six hundred forty-two".