20736774725 has 24 divisors (see below), whose sum is σ = 26329139232. Its totient is φ = 16192814400.

The previous prime is 20736774719. The next prime is 20736774733. The reversal of 20736774725 is 52747763702.

It is a de Polignac number, because none of the positive numbers 2^k-20736774725 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1857410 + ... + 1868540.

It is an arithmetic number, because the mean of its divisors is an integer number (1097047468).

Almost surely, 2^20736774725 is an apocalyptic number.

20736774725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20736774725 is a deficient number, since it is larger than the sum of its proper divisors (5592364507).

20736774725 is a wasteful number, since it uses less digits than its factorization.

20736774725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12917 (or 12912 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 50.

The spelling of 20736774725 in words is "twenty billion, seven hundred thirty-six million, seven hundred seventy-four thousand, seven hundred twenty-five".