20124112500 has 144 divisors (see below), whose sum is σ = 65213951040. Its totient is φ = 5366340000.

The previous prime is 20124112471. The next prime is 20124112571. The reversal of 20124112500 is 521142102.

20124112500 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 411 + 250 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307687 + ... + 367313.

It is an arithmetic number, because the mean of its divisors is an integer number (452874660).

Almost surely, 2^20124112500 is an apocalyptic number.

20124112500 is a gapful number since it is divisible by the number (20) 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 20124112500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32606975520).

20124112500 is an abundant number, since it is smaller than the sum of its proper divisors (45089838540).

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

20124112500 is an equidigital number, since it uses as much as digits as its factorization.

20124112500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59665 (or 59637 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 20124112500 its reverse (521142102), we get a palindrome (20645254602).

The spelling of 20124112500 in words is "twenty billion, one hundred twenty-four million, one hundred twelve thousand, five hundred".