21763751814 has 80 divisors (see below), whose sum is σ = 55762933248. Its totient is φ = 6214945968.

The previous prime is 21763751753. The next prime is 21763751843. The reversal of 21763751814 is 41815736712.

21763751814 is a `hidden beast` number, since 2 + 1 + 7 + 637 + 5 + 1 + 8 + 1 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21763751814.

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 39 ways as a sum of consecutive naturals, for example, 2879989 + ... + 2887535.

Almost surely, 2^21763751814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21763751814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27881466624).

21763751814 is an abundant number, since it is smaller than the sum of its proper divisors (33999181434).

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

21763751814 is a wasteful number, since it uses less digits than its factorization.

21763751814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111 (or 10102 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The spelling of 21763751814 in words is "twenty-one billion, seven hundred sixty-three million, seven hundred fifty-one thousand, eight hundred fourteen".