20224188 has 48 divisors (see below), whose sum is σ = 52702720. Its totient is φ = 6706800.

The previous prime is 20224159. The next prime is 20224207. The reversal of 20224188 is 88142202.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28923 + ... + 29613.

Almost surely, 2^20224188 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20224188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26351360).

20224188 is an abundant number, since it is smaller than the sum of its proper divisors (32478532).

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

20224188 is a wasteful number, since it uses less digits than its factorization.

20224188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 20224188 is about 4497.1310854811. The cubic root of 20224188 is about 272.4522285306.

The spelling of 20224188 in words is "twenty million, two hundred twenty-four thousand, one hundred eighty-eight".