21343185879 has 8 divisors (see below), whose sum is σ = 28479836160. Its totient is φ = 14217663096.

The previous prime is 21343185859. The next prime is 21343185881. The reversal of 21343185879 is 97858134312.

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

It is not a de Polignac number, because 21343185879 - 2⁵ = 21343185847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343185859) 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, 2777397 + ... + 2785070.

It is an arithmetic number, because the mean of its divisors is an integer number (3559979520).

Almost surely, 2^21343185879 is an apocalyptic number.

21343185879 is a deficient number, since it is larger than the sum of its proper divisors (7136650281).

21343185879 is a wasteful number, since it uses less digits than its factorization.

21343185879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563749.

The product of its digits is 1451520, while the sum is 51.

The spelling of 21343185879 in words is "twenty-one billion, three hundred forty-three million, one hundred eighty-five thousand, eight hundred seventy-nine".