20430550515023 has 32 divisors (see below), whose sum is σ = 24685174725120. Its totient is φ = 16679771919360.

The previous prime is 20430550514993. The next prime is 20430550515029. The reversal of 20430550515023 is 32051505503402.

It is not a de Polignac number, because 20430550515023 - 2³² = 20426255547727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430550515029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4047965 + ... + 7566182.

It is an arithmetic number, because the mean of its divisors is an integer number (771411710160).

Almost surely, 2^{20430550515023} is an apocalyptic number.

20430550515023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20430550515023 is a deficient number, since it is larger than the sum of its proper divisors (4254624210097).

20430550515023 is a wasteful number, since it uses less digits than its factorization.

20430550515023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11614607.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20430550515023 in words is "twenty trillion, four hundred thirty billion, five hundred fifty million, five hundred fifteen thousand, twenty-three".