20725313172 has 12 divisors (see below), whose sum is σ = 48359064096. Its totient is φ = 6908437720.

The previous prime is 20725313171. The next prime is 20725313209. The reversal of 20725313172 is 27131352702.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725313171) 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 3 ways as a sum of consecutive naturals, for example, 863554704 + ... + 863554727.

It is an arithmetic number, because the mean of its divisors is an integer number (4029922008).

Almost surely, 2^20725313172 is an apocalyptic number.

It is an amenable number.

20725313172 is an abundant number, since it is smaller than the sum of its proper divisors (27633750924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20725313172 is a wasteful number, since it uses less digits than its factorization.

20725313172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727109438 (or 1727109436 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

Adding to 20725313172 its reverse (27131352702), we get a palindrome (47856665874).

It can be divided in two parts, 2072531 and 3172, that added together give a triangular number (2075703 = T₂₀₃₇).

The spelling of 20725313172 in words is "twenty billion, seven hundred twenty-five million, three hundred thirteen thousand, one hundred seventy-two".