21694232839 has 8 divisors (see below), whose sum is σ = 21966379760. Its totient is φ = 21423782016.

The previous prime is 21694232827. The next prime is 21694232863. The reversal of 21694232839 is 93823249612.

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

It is a cyclic number.

It is not a de Polignac number, because 21694232839 - 2⁷ = 21694232711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21694232792 and 21694232801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21694235839) 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, 398274 + ... + 449455.

It is an arithmetic number, because the mean of its divisors is an integer number (2745797470).

Almost surely, 2^21694232839 is an apocalyptic number.

21694232839 is a deficient number, since it is larger than the sum of its proper divisors (272146921).

21694232839 is a wasteful number, since it uses less digits than its factorization.

21694232839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848049.

The product of its digits is 1119744, while the sum is 49.

The spelling of 21694232839 in words is "twenty-one billion, six hundred ninety-four million, two hundred thirty-two thousand, eight hundred thirty-nine".