21763522068 has 12 divisors (see below), whose sum is σ = 50781551520. Its totient is φ = 7254507352.

The previous prime is 21763522049. The next prime is 21763522087. The reversal of 21763522068 is 86022536712.

It is an interprime number because it is at equal distance from previous prime (21763522049) and next prime (21763522087).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906813408 + ... + 906813431.

It is an arithmetic number, because the mean of its divisors is an integer number (4231795960).

Almost surely, 2^21763522068 is an apocalyptic number.

It is an amenable number.

21763522068 is an abundant number, since it is smaller than the sum of its proper divisors (29018029452).

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

21763522068 is a wasteful number, since it uses less digits than its factorization.

21763522068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813626846 (or 1813626844 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 21763522068 in words is "twenty-one billion, seven hundred sixty-three million, five hundred twenty-two thousand, sixty-eight".