21876395218 has 8 divisors (see below), whose sum is σ = 34541676720. Its totient is φ = 10362502980.

The previous prime is 21876395213. The next prime is 21876395257. The reversal of 21876395218 is 81259367812.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (21876395213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287847268 + ... + 287847343.

It is an arithmetic number, because the mean of its divisors is an integer number (4317709590).

Almost surely, 2^21876395218 is an apocalyptic number.

21876395218 is a deficient number, since it is larger than the sum of its proper divisors (12665281502).

21876395218 is a wasteful number, since it uses less digits than its factorization.

21876395218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575694632.

The product of its digits is 1451520, while the sum is 52.

The spelling of 21876395218 in words is "twenty-one billion, eight hundred seventy-six million, three hundred ninety-five thousand, two hundred eighteen".