20156031325 has 6 divisors (see below), whose sum is σ = 24993478874. Its totient is φ = 16124825040.

The previous prime is 20156031299. The next prime is 20156031331. The reversal of 20156031325 is 52313065102.

It can be written as a sum of positive squares in 3 ways, for example, as 357852889 + 19798178436 = 18917^2 + 140706^2 .

It is not a de Polignac number, because 20156031325 - 2⁵ = 20156031293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20156031293 and 20156031302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 403120602 + ... + 403120651.

Almost surely, 2^20156031325 is an apocalyptic number.

20156031325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20156031325 is a deficient number, since it is larger than the sum of its proper divisors (4837447549).

20156031325 is an equidigital number, since it uses as much as digits as its factorization.

20156031325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806241263 (or 806241258 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 20156031325 its reverse (52313065102), we get a palindrome (72469096427).

The spelling of 20156031325 in words is "twenty billion, one hundred fifty-six million, thirty-one thousand, three hundred twenty-five".