20443646316 has 12 divisors (see below), whose sum is σ = 47701841432. Its totient is φ = 6814548768.

The previous prime is 20443646287. The next prime is 20443646357. The reversal of 20443646316 is 61364634402.

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

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, 851818585 + ... + 851818608.

Almost surely, 2^20443646316 is an apocalyptic number.

It is an amenable number.

20443646316 is an abundant number, since it is smaller than the sum of its proper divisors (27258195116).

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

20443646316 is a wasteful number, since it uses less digits than its factorization.

20443646316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703637200 (or 1703637198 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 20443646316 in words is "twenty billion, four hundred forty-three million, six hundred forty-six thousand, three hundred sixteen".