21399334000 has 120 divisors (see below), whose sum is σ = 56875828464. Its totient is φ = 7781488000.

The previous prime is 21399333973. The next prime is 21399334031. The reversal of 21399334000 is 43399312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197787 + ... + 286213.

Almost surely, 2^21399334000 is an apocalyptic number.

21399334000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21399334000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28437914232).

21399334000 is an abundant number, since it is smaller than the sum of its proper divisors (35476494464).

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

21399334000 is a wasteful number, since it uses less digits than its factorization.

21399334000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88472 (or 88445 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 34.

The spelling of 21399334000 in words is "twenty-one billion, three hundred ninety-nine million, three hundred thirty-four thousand".