21696315859 has 8 divisors (see below), whose sum is σ = 22841844480. Its totient is φ = 20551149000.

The previous prime is 21696315779. The next prime is 21696315877. The reversal of 21696315859 is 95851369612.

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 21696315859 - 2¹¹ = 21696313811 is a prime.

It is a super-3 number, since 3×21696315859³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21696315889) 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, 37314 + ... + 211624.

It is an arithmetic number, because the mean of its divisors is an integer number (2855230560).

Almost surely, 2^21696315859 is an apocalyptic number.

21696315859 is a deficient number, since it is larger than the sum of its proper divisors (1145528621).

21696315859 is a wasteful number, since it uses less digits than its factorization.

21696315859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180881.

The product of its digits is 3499200, while the sum is 55.

The spelling of 21696315859 in words is "twenty-one billion, six hundred ninety-six million, three hundred fifteen thousand, eight hundred fifty-nine".