21798713496 has 192 divisors, whose sum is σ = 66502529280. Its totient is φ = 5925722880.

The previous prime is 21798713467. The next prime is 21798713501. The reversal of 21798713496 is 69431789712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5326411 + ... + 5330501.

It is an arithmetic number, because the mean of its divisors is an integer number (346367340).

Almost surely, 2^21798713496 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 21798713496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33251264640).

21798713496 is an abundant number, since it is smaller than the sum of its proper divisors (44703815784).

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

21798713496 is a wasteful number, since it uses less digits than its factorization.

21798713496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334 (or 4323 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The spelling of 21798713496 in words is "twenty-one billion, seven hundred ninety-eight million, seven hundred thirteen thousand, four hundred ninety-six".