20555443512 has 96 divisors (see below), whose sum is σ = 62048235600. Its totient is φ = 6109350912.

The previous prime is 20555443511. The next prime is 20555443523. The reversal of 20555443512 is 21534455502.

20555443512 is a `hidden beast` number, since 2 + 0 + 55 + 54 + 43 + 512 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555443511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418683 + ... + 465194.

Almost surely, 2^20555443512 is an apocalyptic number.

It is an amenable number.

20555443512 is an abundant number, since it is smaller than the sum of its proper divisors (41492792088).

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

20555443512 is a wasteful number, since it uses less digits than its factorization.

20555443512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883925 (or 883918 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 20555443512 in words is "twenty billion, five hundred fifty-five million, four hundred forty-three thousand, five hundred twelve".