20331031420 has 48 divisors (see below), whose sum is σ = 48829007808. Its totient is φ = 6965706240.

The previous prime is 20331031397. The next prime is 20331031429. The reversal of 20331031420 is 2413013302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331031429) 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, 149950 + ... + 251290.

It is an arithmetic number, because the mean of its divisors is an integer number (1017270996).

Almost surely, 2^20331031420 is an apocalyptic number.

20331031420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20331031420 is an abundant number, since it is smaller than the sum of its proper divisors (28497976388).

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

20331031420 is a wasteful number, since it uses less digits than its factorization.

20331031420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102790 (or 102788 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20331031420 its reverse (2413013302), we get a palindrome (22744044722).

The spelling of 20331031420 in words is "twenty billion, three hundred thirty-one million, thirty-one thousand, four hundred twenty".