21914221982 has 4 divisors (see below), whose sum is σ = 32871332976. Its totient is φ = 10957110990.

The previous prime is 21914221963. The next prime is 21914222017. The reversal of 21914221982 is 28912241912.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×21914221982³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5478555494 + ... + 5478555497.

It is an arithmetic number, because the mean of its divisors is an integer number (8217833244).

Almost surely, 2^21914221982 is an apocalyptic number.

21914221982 is a deficient number, since it is larger than the sum of its proper divisors (10957110994).

21914221982 is a wasteful number, since it uses less digits than its factorization.

21914221982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10957110993.

The product of its digits is 41472, while the sum is 41.

The spelling of 21914221982 in words is "twenty-one billion, nine hundred fourteen million, two hundred twenty-one thousand, nine hundred eighty-two".