21369874359 has 8 divisors (see below), whose sum is σ = 28620938752. Its totient is φ = 14182696440.

The previous prime is 21369874307. The next prime is 21369874387. The reversal of 21369874359 is 95347896312.

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

It is not a de Polignac number, because 21369874359 - 2¹⁷ = 21369743287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21369874299 and 21369874308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21369874859) 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, 15970837 + ... + 15972174.

It is an arithmetic number, because the mean of its divisors is an integer number (3577617344).

Almost surely, 2^21369874359 is an apocalyptic number.

21369874359 is a deficient number, since it is larger than the sum of its proper divisors (7251064393).

21369874359 is a wasteful number, since it uses less digits than its factorization.

21369874359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31943237.

The product of its digits is 9797760, while the sum is 57.

The spelling of 21369874359 in words is "twenty-one billion, three hundred sixty-nine million, eight hundred seventy-four thousand, three hundred fifty-nine".