20235031320 has 128 divisors (see below), whose sum is σ = 73458316800. Its totient is φ = 4353079296.

The previous prime is 20235031291. The next prime is 20235031339. The reversal of 20235031320 is 2313053202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 694230 + ... + 722789.

It is an arithmetic number, because the mean of its divisors is an integer number (573893100).

Almost surely, 2^20235031320 is an apocalyptic number.

20235031320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20235031320 is an abundant number, since it is smaller than the sum of its proper divisors (53223285480).

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

20235031320 is a wasteful number, since it uses less digits than its factorization.

20235031320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417057 (or 1417053 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

Adding to 20235031320 its reverse (2313053202), we get a palindrome (22548084522).

The spelling of 20235031320 in words is "twenty billion, two hundred thirty-five million, thirty-one thousand, three hundred twenty".