20490743575 has 6 divisors (see below), whose sum is σ = 25408522064. Its totient is φ = 16392594840.

The previous prime is 20490743543. The next prime is 20490743587. The reversal of 20490743575 is 57534709402.

It is not a de Polignac number, because 20490743575 - 2⁵ = 20490743543 is a prime.

It is a Duffinian number.

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, 409814847 + ... + 409814896.

Almost surely, 2^20490743575 is an apocalyptic number.

20490743575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20490743575 is a deficient number, since it is larger than the sum of its proper divisors (4917778489).

20490743575 is an equidigital number, since it uses as much as digits as its factorization.

20490743575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819629753 (or 819629748 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 46.

The spelling of 20490743575 in words is "twenty billion, four hundred ninety million, seven hundred forty-three thousand, five hundred seventy-five".