20440966188 has 12 divisors (see below), whose sum is σ = 47695587800. Its totient is φ = 6813655392.

The previous prime is 20440966159. The next prime is 20440966193. The reversal of 20440966188 is 88166904402.

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, 851706913 + ... + 851706936.

Almost surely, 2^20440966188 is an apocalyptic number.

It is an amenable number.

20440966188 is an abundant number, since it is smaller than the sum of its proper divisors (27254621612).

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

20440966188 is a wasteful number, since it uses less digits than its factorization.

20440966188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703413856 (or 1703413854 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 20440966188 in words is "twenty billion, four hundred forty million, nine hundred sixty-six thousand, one hundred eighty-eight".