20871325 has 12 divisors (see below), whose sum is σ = 27403380. Its totient is φ = 15714560.

The previous prime is 20871311. The next prime is 20871341. The reversal of 20871325 is 52317802.

It can be written as a sum of positive squares in 6 ways, for example, as 702244 + 20169081 = 838^2 + 4491^2 .

It is not a de Polignac number, because 20871325 - 2⁷ = 20871197 is a prime.

It is a super-2 number, since 2×20871325² = 871224414511250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20871293 and 20871302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24130 + ... + 24979.

It is an arithmetic number, because the mean of its divisors is an integer number (2283615).

Almost surely, 2^20871325 is an apocalyptic number.

20871325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20871325 is a deficient number, since it is larger than the sum of its proper divisors (6532055).

20871325 is a wasteful number, since it uses less digits than its factorization.

20871325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49136 (or 49131 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20871325 is about 4568.5145288157. The cubic root of 20871325 is about 275.3277634643.

The spelling of 20871325 in words is "twenty million, eight hundred seventy-one thousand, three hundred twenty-five".