21294393119 has 4 divisors (see below), whose sum is σ = 21294732144. Its totient is φ = 21294054096.

The previous prime is 21294393091. The next prime is 21294393167. The reversal of 21294393119 is 91139349212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21294393119 is a prime.

It is a super-2 number, since 2×21294393119² (a number of 21 digits) 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 21294393119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21294393019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44627 + ... + 211140.

It is an arithmetic number, because the mean of its divisors is an integer number (5323683036).

Almost surely, 2^21294393119 is an apocalyptic number.

21294393119 is a deficient number, since it is larger than the sum of its proper divisors (339025).

21294393119 is an equidigital number, since it uses as much as digits as its factorization.

21294393119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339024.

The product of its digits is 104976, while the sum is 44.

The spelling of 21294393119 in words is "twenty-one billion, two hundred ninety-four million, three hundred ninety-three thousand, one hundred nineteen".