20445116512 has 24 divisors (see below), whose sum is σ = 40476202200. Its totient is φ = 10165446144.

The previous prime is 20445116479. The next prime is 20445116533. The reversal of 20445116512 is 21561154402.

It is a happy number.

It is a super-2 number, since 2×20445116512² (a number of 21 digits) contains 22 as substring.

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, 1778937 + ... + 1790392.

It is an arithmetic number, because the mean of its divisors is an integer number (1686508425).

Almost surely, 2^20445116512 is an apocalyptic number.

It is an amenable number.

20445116512 is a deficient number, since it is larger than the sum of its proper divisors (20031085688).

20445116512 is a wasteful number, since it uses less digits than its factorization.

20445116512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569518 (or 3569510 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 20445116512 in words is "twenty billion, four hundred forty-five million, one hundred sixteen thousand, five hundred twelve".