20323131420 has 48 divisors (see below), whose sum is σ = 57149033760. Its totient is φ = 5396238336.

The previous prime is 20323131419. The next prime is 20323131427. The reversal of 20323131420 is 2413132302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323131427) 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, 712885 + ... + 740844.

It is an arithmetic number, because the mean of its divisors is an integer number (1190604870).

Almost surely, 2^20323131420 is an apocalyptic number.

20323131420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20323131420 is an abundant number, since it is smaller than the sum of its proper divisors (36825902340).

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

20323131420 is a wasteful number, since it uses less digits than its factorization.

20323131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453974 (or 1453972 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20323131420 its reverse (2413132302), we get a palindrome (22736263722).

The spelling of 20323131420 in words is "twenty billion, three hundred twenty-three million, one hundred thirty-one thousand, four hundred twenty".