22668947920 has 80 divisors (see below), whose sum is σ = 53425241280. Its totient is φ = 8944212992.

The previous prime is 22668947869. The next prime is 22668947971. The reversal of 22668947920 is 2974986622.

It is an interprime number because it is at equal distance from previous prime (22668947869) and next prime (22668947971).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3150567 + ... + 3157753.

It is an arithmetic number, because the mean of its divisors is an integer number (667815516).

Almost surely, 2^22668947920 is an apocalyptic number.

22668947920 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 22668947920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26712620640).

22668947920 is an abundant number, since it is smaller than the sum of its proper divisors (30756293360).

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

22668947920 is a wasteful number, since it uses less digits than its factorization.

22668947920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7732 (or 7726 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 22668947920 in words is "twenty-two billion, six hundred sixty-eight million, nine hundred forty-seven thousand, nine hundred twenty".