20623351020 has 24 divisors (see below), whose sum is σ = 57745383024. Its totient is φ = 5499560256.

The previous prime is 20623351019. The next prime is 20623351031. The reversal of 20623351020 is 2015332602.

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, 171861199 + ... + 171861318.

It is an arithmetic number, because the mean of its divisors is an integer number (2406057626).

Almost surely, 2^20623351020 is an apocalyptic number.

20623351020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20623351020 is an abundant number, since it is smaller than the sum of its proper divisors (37122032004).

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

20623351020 is a wasteful number, since it uses less digits than its factorization.

20623351020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343722529 (or 343722527 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 20623351020 its reverse (2015332602), we get a palindrome (22638683622).

The spelling of 20623351020 in words is "twenty billion, six hundred twenty-three million, three hundred fifty-one thousand, twenty".