20173424 has 20 divisors (see below), whose sum is σ = 41385744. Its totient is φ = 9493248.

The previous prime is 20173423. The next prime is 20173427. The reversal of 20173424 is 42437102.

It is a self number, because there is not a number n which added to its sum of digits gives 20173424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36812 + ... + 37355.

Almost surely, 2^20173424 is an apocalyptic number.

It is an amenable number.

20173424 is an abundant number, since it is smaller than the sum of its proper divisors (21212320).

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

20173424 is a wasteful number, since it uses less digits than its factorization.

20173424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74192 (or 74186 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20173424 is about 4491.4834965744. The cubic root of 20173424 is about 272.2240800527.

The spelling of 20173424 in words is "twenty million, one hundred seventy-three thousand, four hundred twenty-four".