20724305137775 has 12 divisors (see below), whose sum is σ = 26392682652312. Its totient is φ = 16131351025440.

The previous prime is 20724305137751. The next prime is 20724305137871. The reversal of 20724305137775 is 57773150342702.

It is not a de Polignac number, because 20724305137775 - 2¹⁴ = 20724305121391 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 11 ways as a sum of consecutive naturals, for example, 11202326177 + ... + 11202328026.

It is an arithmetic number, because the mean of its divisors is an integer number (2199390221026).

Almost surely, 2^{20724305137775} is an apocalyptic number.

20724305137775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20724305137775 is a deficient number, since it is larger than the sum of its proper divisors (5668377514537).

20724305137775 is a wasteful number, since it uses less digits than its factorization.

20724305137775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22404654250 (or 22404654245 counting only the distinct ones).

The product of its (nonzero) digits is 8643600, while the sum is 53.

The spelling of 20724305137775 in words is "twenty trillion, seven hundred twenty-four billion, three hundred five million, one hundred thirty-seven thousand, seven hundred seventy-five".