20621230675 has 6 divisors (see below), whose sum is σ = 25570326068. Its totient is φ = 16496984520.

The previous prime is 20621230657. The next prime is 20621230687. The reversal of 20621230675 is 57603212602.

It is not a de Polignac number, because 20621230675 - 2¹¹ = 20621228627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20621230675.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412424589 + ... + 412424638.

Almost surely, 2^20621230675 is an apocalyptic number.

20621230675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20621230675 is a deficient number, since it is larger than the sum of its proper divisors (4949095393).

20621230675 is an equidigital number, since it uses as much as digits as its factorization.

20621230675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824849237 (or 824849232 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20621230675 in words is "twenty billion, six hundred twenty-one million, two hundred thirty thousand, six hundred seventy-five".