19881248 has 12 divisors (see below), whose sum is σ = 39141270. Its totient is φ = 9940608.

The previous prime is 19881241. The next prime is 19881259. The reversal of 19881248 is 84218891.

It can be written as a sum of positive squares in only one way, i.e., 18905104 + 976144 = 4348^2 + 988^2 .

It is not an unprimeable number, because it can be changed into a prime (19881241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310613 + ... + 310676.

Almost surely, 2^19881248 is an apocalyptic number.

It is an amenable number.

19881248 is a deficient number, since it is larger than the sum of its proper divisors (19260022).

19881248 is an equidigital number, since it uses as much as digits as its factorization.

19881248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621299 (or 621291 counting only the distinct ones).

The product of its digits is 36864, while the sum is 41.

The square root of 19881248 is about 4458.8393108521. The cubic root of 19881248 is about 270.9034573029.

The spelling of 19881248 in words is "nineteen million, eight hundred eighty-one thousand, two hundred forty-eight".