19799774 has 4 divisors (see below), whose sum is σ = 29699664. Its totient is φ = 9899886.

The previous prime is 19799749. The next prime is 19799783. The reversal of 19799774 is 47799791.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 4949942 + ... + 4949945.

It is an arithmetic number, because the mean of its divisors is an integer number (7424916).

Almost surely, 2^19799774 is an apocalyptic number.

19799774 is a deficient number, since it is larger than the sum of its proper divisors (9899890).

19799774 is an equidigital number, since it uses as much as digits as its factorization.

19799774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9899889.

The product of its digits is 1000188, while the sum is 53.

The square root of 19799774 is about 4449.6936973234. The cubic root of 19799774 is about 270.5328935915.

The spelling of 19799774 in words is "nineteen million, seven hundred ninety-nine thousand, seven hundred seventy-four".