20158224 has 40 divisors (see below), whose sum is σ = 53350752. Its totient is φ = 6554880.

The previous prime is 20158211. The next prime is 20158247. The reversal of 20158224 is 42285102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20158194 and 20158203.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3154 + ... + 7089.

Almost surely, 2^20158224 is an apocalyptic number.

20158224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20158224 is an abundant number, since it is smaller than the sum of its proper divisors (33192528).

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

20158224 is a wasteful number, since it uses less digits than its factorization.

20158224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10295 (or 10289 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 20158224 is about 4489.7910864538. The cubic root of 20158224 is about 272.1556922952.

The spelling of 20158224 in words is "twenty million, one hundred fifty-eight thousand, two hundred twenty-four".