19981472 has 24 divisors (see below), whose sum is σ = 44958816. Its totient is φ = 8563392.

The previous prime is 19981463. The next prime is 19981523. The reversal of 19981472 is 27418991.

It is a super-3 number, since 3×19981472³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44378 + ... + 44825.

It is an arithmetic number, because the mean of its divisors is an integer number (1873284).

Almost surely, 2^19981472 is an apocalyptic number.

It is an amenable number.

19981472 is an abundant number, since it is smaller than the sum of its proper divisors (24977344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19981472 is an equidigital number, since it uses as much as digits as its factorization.

19981472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89220 (or 89212 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 19981472 is about 4470.0639816450. The cubic root of 19981472 is about 271.3579145462.

The spelling of 19981472 in words is "nineteen million, nine hundred eighty-one thousand, four hundred seventy-two".