20633729161975 has 6 divisors (see below), whose sum is σ = 25585824160880. Its totient is φ = 16506983329560.

The previous prime is 20633729161889. The next prime is 20633729161987. The reversal of 20633729161975 is 57916192733602.

It is not a de Polignac number, because 20633729161975 - 2²⁵ = 20633695607543 is a prime.

It is a congruent number.

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, 412674583215 + ... + 412674583264.

Almost surely, 2^{20633729161975} is an apocalyptic number.

20633729161975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20633729161975 is a deficient number, since it is larger than the sum of its proper divisors (4952094998905).

20633729161975 is an equidigital number, since it uses as much as digits as its factorization.

20633729161975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825349166489 (or 825349166484 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 20633729161975 in words is "twenty trillion, six hundred thirty-three billion, seven hundred twenty-nine million, one hundred sixty-one thousand, nine hundred seventy-five".