20130131424 has 96 divisors (see below), whose sum is σ = 56938702464. Its totient is φ = 6190364160.

The previous prime is 20130131423. The next prime is 20130131431. The reversal of 20130131424 is 42413103102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×20130131424² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20130131424.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130131423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2955607 + ... + 2962409.

It is an arithmetic number, because the mean of its divisors is an integer number (593111484).

Almost surely, 2^20130131424 is an apocalyptic number.

20130131424 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 20130131424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28469351232).

20130131424 is an abundant number, since it is smaller than the sum of its proper divisors (36808571040).

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

20130131424 is a wasteful number, since it uses less digits than its factorization.

20130131424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9200 (or 9192 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20130131424 its reverse (42413103102), we get a palindrome (62543234526).

The spelling of 20130131424 in words is "twenty billion, one hundred thirty million, one hundred thirty-one thousand, four hundred twenty-four".