20124269136 has 120 divisors (see below), whose sum is σ = 57291511680. Its totient is φ = 6593154048.

The previous prime is 20124269131. The next prime is 20124269147. The reversal of 20124269136 is 63196242102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20124269136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124269131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2578456 + ... + 2586248.

It is an arithmetic number, because the mean of its divisors is an integer number (477429264).

Almost surely, 2^20124269136 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 20124269136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28645755840).

20124269136 is an abundant number, since it is smaller than the sum of its proper divisors (37167242544).

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

20124269136 is a wasteful number, since it uses less digits than its factorization.

20124269136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8113 (or 8104 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 20124269136 in words is "twenty billion, one hundred twenty-four million, two hundred sixty-nine thousand, one hundred thirty-six".