20748325 has 12 divisors (see below), whose sum is σ = 27707428. Its totient is φ = 15321600.

The previous prime is 20748319. The next prime is 20748341. The reversal of 20748325 is 52384702.

It can be written as a sum of positive squares in 6 ways, for example, as 1397124 + 19351201 = 1182^2 + 4399^2 .

It is not a de Polignac number, because 20748325 - 2¹¹ = 20746277 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31596 + ... + 32245.

Almost surely, 2^20748325 is an apocalyptic number.

20748325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20748325 is a deficient number, since it is larger than the sum of its proper divisors (6959103).

20748325 is a wasteful number, since it uses less digits than its factorization.

20748325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63864 (or 63859 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20748325 is about 4555.0329307262. The cubic root of 20748325 is about 274.7858387710.

The spelling of 20748325 in words is "twenty million, seven hundred forty-eight thousand, three hundred twenty-five".