19468979 has 4 divisors (see below), whose sum is σ = 19514376. Its totient is φ = 19423584.

The previous prime is 19468949. The next prime is 19468987. The reversal of 19468979 is 97986491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97986491 = 1609 ⋅60899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19468979 is a prime.

It is a super-2 number, since 2×19468979² = 758082286604882, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19468979.

It is not an unprimeable number, because it can be changed into a prime (19468909) 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, 22049 + ... + 22914.

It is an arithmetic number, because the mean of its divisors is an integer number (4878594).

Almost surely, 2^19468979 is an apocalyptic number.

19468979 is a deficient number, since it is larger than the sum of its proper divisors (45397).

19468979 is an equidigital number, since it uses as much as digits as its factorization.

19468979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45396.

The product of its digits is 979776, while the sum is 53.

The square root of 19468979 is about 4412.3665985500. The cubic root of 19468979 is about 269.0178261013.

The spelling of 19468979 in words is "nineteen million, four hundred sixty-eight thousand, nine hundred seventy-nine".