19920886 has 4 divisors (see below), whose sum is σ = 29881332. Its totient is φ = 9960442.

The previous prime is 19920871. The next prime is 19920893. The reversal of 19920886 is 68802991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980220 + ... + 4980223.

It is an arithmetic number, because the mean of its divisors is an integer number (7470333).

Almost surely, 2^19920886 is an apocalyptic number.

19920886 is a deficient number, since it is larger than the sum of its proper divisors (9960446).

19920886 is an equidigital number, since it uses as much as digits as its factorization.

19920886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960445.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 19920886 is about 4463.2819763040. The cubic root of 19920886 is about 271.0833746272.

The spelling of 19920886 in words is "nineteen million, nine hundred twenty thousand, eight hundred eighty-six".