20125224 has 96 divisors (see below), whose sum is σ = 63261120. Its totient is φ = 5660928.

The previous prime is 20125177. The next prime is 20125241. The reversal of 20125224 is 42252102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20125197 and 20125206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36519 + ... + 37065.

It is an arithmetic number, because the mean of its divisors is an integer number (658970).

Almost surely, 2^20125224 is an apocalyptic number.

20125224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20125224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31630560).

20125224 is an abundant number, since it is smaller than the sum of its proper divisors (43135896).

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

20125224 is a wasteful number, since it uses less digits than its factorization.

20125224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 20125224 is about 4486.1145772260. The cubic root of 20125224 is about 272.0071004490.

Adding to 20125224 its reverse (42252102), we get a palindrome (62377326).

It can be divided in two parts, 201 and 25224, that added together give a triangular number (25425 = T₂₂₅).

The spelling of 20125224 in words is "twenty million, one hundred twenty-five thousand, two hundred twenty-four".