22643997508 has 48 divisors (see below), whose sum is σ = 44473193856. Its totient is φ = 10000373760.

The previous prime is 22643997491. The next prime is 22643997577. The reversal of 22643997508 is 80579934622.

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, 193060 + ... + 287332.

It is an arithmetic number, because the mean of its divisors is an integer number (926524872).

Almost surely, 2^22643997508 is an apocalyptic number.

It is an amenable number.

22643997508 is a deficient number, since it is larger than the sum of its proper divisors (21829196348).

22643997508 is a wasteful number, since it uses less digits than its factorization.

22643997508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94444 (or 94442 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 22643997508 in words is "twenty-two billion, six hundred forty-three million, nine hundred ninety-seven thousand, five hundred eight".