19954319 has 12 divisors (see below), whose sum is σ = 25323048. Its totient is φ = 15548400.

The previous prime is 19954309. The next prime is 19954321. The reversal of 19954319 is 91345991.

It is not a de Polignac number, because 19954319 - 2²⁰ = 18905743 is a prime.

It is a super-2 number, since 2×19954319² = 796349693507522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19954309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17972 + ... + 19049.

It is an arithmetic number, because the mean of its divisors is an integer number (2110254).

Almost surely, 2^19954319 is an apocalyptic number.

19954319 is a deficient number, since it is larger than the sum of its proper divisors (5368729).

19954319 is a wasteful number, since it uses less digits than its factorization.

19954319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37046 (or 37039 counting only the distinct ones).

The product of its digits is 43740, while the sum is 41.

The square root of 19954319 is about 4467.0257442733. The cubic root of 19954319 is about 271.2349419320.

The spelling of 19954319 in words is "nineteen million, nine hundred fifty-four thousand, three hundred nineteen".