19930899 has 4 divisors (see below), whose sum is σ = 26574536. Its totient is φ = 13287264.

The previous prime is 19930891. The next prime is 19930921. The reversal of 19930899 is 99803991.

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

It is not a de Polignac number, because 19930899 - 2³ = 19930891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19930891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3321814 + ... + 3321819.

It is an arithmetic number, because the mean of its divisors is an integer number (6643634).

Almost surely, 2^19930899 is an apocalyptic number.

19930899 is a deficient number, since it is larger than the sum of its proper divisors (6643637).

19930899 is an equidigital number, since it uses as much as digits as its factorization.

19930899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643636.

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 19930899 is about 4464.4035435879. The cubic root of 19930899 is about 271.1287859805.

The spelling of 19930899 in words is "nineteen million, nine hundred thirty thousand, eight hundred ninety-nine".