20775770725 has 24 divisors (see below), whose sum is σ = 26367598080. Its totient is φ = 16231427520.

The previous prime is 20775770711. The next prime is 20775770731. The reversal of 20775770725 is 52707757702.

It is not a de Polignac number, because 20775770725 - 2¹¹ = 20775768677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 524931 + ... + 563119.

It is an arithmetic number, because the mean of its divisors is an integer number (1098649920).

Almost surely, 2^20775770725 is an apocalyptic number.

20775770725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20775770725 is a deficient number, since it is larger than the sum of its proper divisors (5591827355).

20775770725 is a wasteful number, since it uses less digits than its factorization.

20775770725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38709 (or 38704 counting only the distinct ones).

The product of its (nonzero) digits is 1680700, while the sum is 49.

The spelling of 20775770725 in words is "twenty billion, seven hundred seventy-five million, seven hundred seventy thousand, seven hundred twenty-five".