20031430312220 has 12 divisors (see below), whose sum is σ = 42066003655704. Its totient is φ = 8012572124880.

The previous prime is 20031430312183. The next prime is 20031430312241. The reversal of 20031430312220 is 2221303413002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500785757786 + ... + 500785757825.

It is an arithmetic number, because the mean of its divisors is an integer number (3505500304642).

Almost surely, 2^{20031430312220} is an apocalyptic number.

20031430312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031430312220 is an abundant number, since it is smaller than the sum of its proper divisors (22034573343484).

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

20031430312220 is a wasteful number, since it uses less digits than its factorization.

20031430312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001571515620 (or 1001571515618 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20031430312220 its reverse (2221303413002), we get a palindrome (22252733725222).

The spelling of 20031430312220 in words is "twenty trillion, thirty-one billion, four hundred thirty million, three hundred twelve thousand, two hundred twenty".