19980725 has 12 divisors (see below), whose sum is σ = 24908004. Its totient is φ = 15899520.

The previous prime is 19980713. The next prime is 19980743. The reversal of 19980725 is 52708991.

It can be written as a sum of positive squares in 6 ways, for example, as 682276 + 19298449 = 826^2 + 4393^2 .

It is not a de Polignac number, because 19980725 - 2⁸ = 19980469 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 11 ways as a sum of consecutive naturals, for example, 2897 + ... + 6953.

It is an arithmetic number, because the mean of its divisors is an integer number (2075667).

Almost surely, 2^19980725 is an apocalyptic number.

It is an amenable number.

19980725 is a deficient number, since it is larger than the sum of its proper divisors (4927279).

19980725 is a wasteful number, since it uses less digits than its factorization.

19980725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4259 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 19980725 is about 4469.9804250131. The cubic root of 19980725 is about 271.3545329653.

The spelling of 19980725 in words is "nineteen million, nine hundred eighty thousand, seven hundred twenty-five".