21194463319 has 8 divisors (see below), whose sum is σ = 21282367392. Its totient is φ = 21106615200.

The previous prime is 21194463299. The next prime is 21194463337. The reversal of 21194463319 is 91336449112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21194463319 is a prime.

It is a super-2 number, since 2×21194463319² (a number of 21 digits) 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 (21194463019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855957 + ... + 880369.

It is an arithmetic number, because the mean of its divisors is an integer number (2660295924).

Almost surely, 2^21194463319 is an apocalyptic number.

21194463319 is a deficient number, since it is larger than the sum of its proper divisors (87904073).

21194463319 is a wasteful number, since it uses less digits than its factorization.

21194463319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27977.

The product of its digits is 139968, while the sum is 43.

The spelling of 21194463319 in words is "twenty-one billion, one hundred ninety-four million, four hundred sixty-three thousand, three hundred nineteen".