20124432 has 30 divisors (see below), whose sum is σ = 56320862. Its totient is φ = 6708096.

The previous prime is 20124409. The next prime is 20124437. The reversal of 20124432 is 23442102.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 197136 = 4464^2 + 444^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69733 + ... + 70020.

Almost surely, 2^20124432 is an apocalyptic number.

It is an amenable number.

20124432 is an abundant number, since it is smaller than the sum of its proper divisors (36196430).

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

20124432 is a wasteful number, since it uses less digits than its factorization.

20124432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139767 (or 139758 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20124432 is about 4486.0263039799. The cubic root of 20124432 is about 272.0035322494.

Adding to 20124432 its reverse (23442102), we get a palindrome (43566534).

The spelling of 20124432 in words is "twenty million, one hundred twenty-four thousand, four hundred thirty-two".