20173782925 has 12 divisors (see below), whose sum is σ = 25263172116. Its totient is φ = 15979232000.

The previous prime is 20173782919. The next prime is 20173782929. The reversal of 20173782925 is 52928737102.

It can be written as a sum of positive squares in 6 ways, for example, as 4654104841 + 15519678084 = 68221^2 + 124578^2 .

It is not a de Polignac number, because 20173782925 - 2³ = 20173782917 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 (20173782929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3992284 + ... + 3997333.

It is an arithmetic number, because the mean of its divisors is an integer number (2105264343).

Almost surely, 2^20173782925 is an apocalyptic number.

20173782925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20173782925 is a deficient number, since it is larger than the sum of its proper divisors (5089389191).

20173782925 is a wasteful number, since it uses less digits than its factorization.

20173782925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7989728 (or 7989723 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 20173782925 in words is "twenty billion, one hundred seventy-three million, seven hundred eighty-two thousand, nine hundred twenty-five".