21914233856 has 88 divisors (see below), whose sum is σ = 44525099424. Its totient is φ = 10779033600.

The previous prime is 21914233837. The next prime is 21914233879. The reversal of 21914233856 is 65833241912.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18246056 + ... + 18247256.

Almost surely, 2^21914233856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21914233856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22262549712).

21914233856 is an abundant number, since it is smaller than the sum of its proper divisors (22610865568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21914233856 is a wasteful number, since it uses less digits than its factorization.

21914233856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1479 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The spelling of 21914233856 in words is "twenty-one billion, nine hundred fourteen million, two hundred thirty-three thousand, eight hundred fifty-six".