22173420 has 24 divisors (see below), whose sum is σ = 62085744. Its totient is φ = 5912896.

The previous prime is 22173413. The next prime is 22173421. The reversal of 22173420 is 2437122.

It is not an unprimeable number, because it can be changed into a prime (22173421) 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 7 ways as a sum of consecutive naturals, for example, 184719 + ... + 184838.

It is an arithmetic number, because the mean of its divisors is an integer number (2586906).

Almost surely, 2^22173420 is an apocalyptic number.

22173420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22173420 is an abundant number, since it is smaller than the sum of its proper divisors (39912324).

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

22173420 is a wasteful number, since it uses less digits than its factorization.

22173420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369569 (or 369567 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 22173420 is about 4708.8661055503. The cubic root of 22173420 is about 280.9382639838.

The spelling of 22173420 in words is "twenty-two million, one hundred seventy-three thousand, four hundred twenty".