20125311424 has 56 divisors (see below), whose sum is σ = 41494557600. Its totient is φ = 9673036800.

The previous prime is 20125311403. The next prime is 20125311463. The reversal of 20125311424 is 42411352102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401349 + ... + 448699.

Almost surely, 2^20125311424 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 20125311424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20747278800).

20125311424 is an abundant number, since it is smaller than the sum of its proper divisors (21369246176).

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

20125311424 is a wasteful number, since it uses less digits than its factorization.

20125311424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47621 (or 47611 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 20125311424 its reverse (42411352102), we get a palindrome (62536663526).

The spelling of 20125311424 in words is "twenty billion, one hundred twenty-five million, three hundred eleven thousand, four hundred twenty-four".