20872325 has 6 divisors (see below), whose sum is σ = 25881714. Its totient is φ = 16697840.

The previous prime is 20872307. The next prime is 20872337. The reversal of 20872325 is 52327802.

It can be written as a sum of positive squares in 3 ways, for example, as 2630884 + 18241441 = 1622^2 + 4271^2 .

It is not a de Polignac number, because 20872325 - 2⁶ = 20872261 is a prime.

It is a Duffinian number.

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, 417422 + ... + 417471.

It is an arithmetic number, because the mean of its divisors is an integer number (4313619).

Almost surely, 2^20872325 is an apocalyptic number.

20872325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20872325 is a deficient number, since it is larger than the sum of its proper divisors (5009389).

20872325 is an equidigital number, since it uses as much as digits as its factorization.

20872325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834903 (or 834898 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20872325 is about 4568.6239722700. The cubic root of 20872325 is about 275.3321606195.

The spelling of 20872325 in words is "twenty million, eight hundred seventy-two thousand, three hundred twenty-five".