20283645072 has 40 divisors (see below), whose sum is σ = 52447580640. Its totient is φ = 6755000320.

The previous prime is 20283645059. The next prime is 20283645097. The reversal of 20283645072 is 27054638202.

It is a super-2 number, since 2×20283645072² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20283645072.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141297 + ... + 246032.

It is an arithmetic number, because the mean of its divisors is an integer number (1311189516).

Almost surely, 2^20283645072 is an apocalyptic number.

It is an amenable number.

20283645072 is an abundant number, since it is smaller than the sum of its proper divisors (32163935568).

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

20283645072 is a wasteful number, since it uses less digits than its factorization.

20283645072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388431 (or 388425 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 20283645072 in words is "twenty billion, two hundred eighty-three million, six hundred forty-five thousand, seventy-two".