20023251020 has 24 divisors (see below), whose sum is σ = 42641067168. Its totient is φ = 7896492800.

The previous prime is 20023251019. The next prime is 20023251071. The reversal of 20023251020 is 2015232002.

It is a self number, because there is not a number n which added to its sum of digits gives 20023251020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7049021 + ... + 7051860.

It is an arithmetic number, because the mean of its divisors is an integer number (1776711132).

Almost surely, 2^20023251020 is an apocalyptic number.

20023251020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20023251020 is an abundant number, since it is smaller than the sum of its proper divisors (22617816148).

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

20023251020 is a wasteful number, since it uses less digits than its factorization.

20023251020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100961 (or 14100959 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 20023251020 its reverse (2015232002), we get a palindrome (22038483022).

The spelling of 20023251020 in words is "twenty billion, twenty-three million, two hundred fifty-one thousand, twenty".