21331213982 has 8 divisors (see below), whose sum is σ = 34458114936. Its totient is φ = 9845175672.

The previous prime is 21331213973. The next prime is 21331214017. The reversal of 21331213982 is 28931213312.

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, 410215628 + ... + 410215679.

It is an arithmetic number, because the mean of its divisors is an integer number (4307264367).

Almost surely, 2^21331213982 is an apocalyptic number.

21331213982 is a deficient number, since it is larger than the sum of its proper divisors (13126900954).

21331213982 is a wasteful number, since it uses less digits than its factorization.

21331213982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820431322.

The product of its digits is 15552, while the sum is 35.

The spelling of 21331213982 in words is "twenty-one billion, three hundred thirty-one million, two hundred thirteen thousand, nine hundred eighty-two".