21561876214 has 8 divisors (see below), whose sum is σ = 33386131008. Its totient is φ = 10433165880.

The previous prime is 21561876199. The next prime is 21561876221. The reversal of 21561876214 is 41267816512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173886037 + ... + 173886160.

It is an arithmetic number, because the mean of its divisors is an integer number (4173266376).

Almost surely, 2^21561876214 is an apocalyptic number.

21561876214 is a deficient number, since it is larger than the sum of its proper divisors (11824254794).

21561876214 is a wasteful number, since it uses less digits than its factorization.

21561876214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347772230.

The product of its digits is 161280, while the sum is 43.

The spelling of 21561876214 in words is "twenty-one billion, five hundred sixty-one million, eight hundred seventy-six thousand, two hundred fourteen".