20620794725 has 12 divisors (see below), whose sum is σ = 27073891044. Its totient is φ = 15526245120.

The previous prime is 20620794721. The next prime is 20620794731. The reversal of 20620794725 is 52749702602.

It can be written as a sum of positive squares in 6 ways, for example, as 2544798916 + 18075995809 = 50446^2 + 134447^2 .

It is not a de Polignac number, because 20620794725 - 2² = 20620794721 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620794721) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 24259334 + ... + 24260183.

It is an arithmetic number, because the mean of its divisors is an integer number (2256157587).

Almost surely, 2^20620794725 is an apocalyptic number.

20620794725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20620794725 is a deficient number, since it is larger than the sum of its proper divisors (6453096319).

20620794725 is a wasteful number, since it uses less digits than its factorization.

20620794725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48519544 (or 48519539 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 20620794725 in words is "twenty billion, six hundred twenty million, seven hundred ninety-four thousand, seven hundred twenty-five".