19881046 has 8 divisors (see below), whose sum is σ = 29841120. Its totient is φ = 9934008.

The previous prime is 19881019. The next prime is 19881077. The reversal of 19881046 is 64018891.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19880996 and 19881014.

It is a congruent number.

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, 2835 + ... + 6913.

It is an arithmetic number, because the mean of its divisors is an integer number (3730140).

Almost surely, 2^19881046 is an apocalyptic number.

19881046 is a deficient number, since it is larger than the sum of its proper divisors (9960074).

19881046 is a wasteful number, since it uses less digits than its factorization.

19881046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 19881046 is about 4458.8166591597. The cubic root of 19881046 is about 270.9025398104.

The spelling of 19881046 in words is "nineteen million, eight hundred eighty-one thousand, forty-six".