19998532 has 6 divisors (see below), whose sum is σ = 34997438. Its totient is φ = 9999264.

The previous prime is 19998521. The next prime is 19998533. The reversal of 19998532 is 23589991.

It can be written as a sum of positive squares in only one way, i.e., 12068676 + 7929856 = 3474^2 + 2816^2 .

It is not an unprimeable number, because it can be changed into a prime (19998533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499813 + ... + 2499820.

Almost surely, 2^19998532 is an apocalyptic number.

It is an amenable number.

19998532 is a deficient number, since it is larger than the sum of its proper divisors (14998906).

19998532 is a wasteful number, since it uses less digits than its factorization.

19998532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999637 (or 4999635 counting only the distinct ones).

The product of its digits is 174960, while the sum is 46.

The square root of 19998532 is about 4471.9718245982. The cubic root of 19998532 is about 271.4351202219.

The spelling of 19998532 in words is "nineteen million, nine hundred ninety-eight thousand, five hundred thirty-two".