20163492872 has 32 divisors (see below), whose sum is σ = 40062156120. Its totient is φ = 9481190400.

The previous prime is 20163492871. The next prime is 20163492893. The reversal of 20163492872 is 27829436102.

It can be written as a sum of positive squares in 4 ways, for example, as 15568551076 + 4594941796 = 124774^2 + 67786^2 .

It is not an unprimeable number, because it can be changed into a prime (20163492871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115622 + ... + 231722.

Almost surely, 2^20163492872 is an apocalyptic number.

It is an amenable number.

20163492872 is a deficient number, since it is larger than the sum of its proper divisors (19898663248).

20163492872 is a wasteful number, since it uses less digits than its factorization.

20163492872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117401 (or 117397 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 20163492872 in words is "twenty billion, one hundred sixty-three million, four hundred ninety-two thousand, eight hundred seventy-two".