20188440882 has 24 divisors (see below), whose sum is σ = 46314659196. Its totient is φ = 6333628416.

The previous prime is 20188440863. The next prime is 20188440889. The reversal of 20188440882 is 28804488102.

20188440882 is a `hidden beast` number, since 20 + 188 + 440 + 8 + 8 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19170894681 + 1017546201 = 138459^2 + 31899^2 .

It is not an unprimeable number, because it can be changed into a prime (20188440889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32987343 + ... + 32987954.

Almost surely, 2^20188440882 is an apocalyptic number.

20188440882 is an abundant number, since it is smaller than the sum of its proper divisors (26126218314).

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

20188440882 is a wasteful number, since it uses less digits than its factorization.

20188440882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65975322 (or 65975319 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 45.

The spelling of 20188440882 in words is "twenty billion, one hundred eighty-eight million, four hundred forty thousand, eight hundred eighty-two".