20187404193 has 16 divisors (see below), whose sum is σ = 29666218176. Its totient is φ = 12108656640.

The previous prime is 20187404179. The next prime is 20187404213. The reversal of 20187404193 is 39140478102.

It is not a de Polignac number, because 20187404193 - 2⁴ = 20187404177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20187404093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3150096 + ... + 3156497.

It is an arithmetic number, because the mean of its divisors is an integer number (1854138636).

Almost surely, 2^20187404193 is an apocalyptic number.

It is an amenable number.

20187404193 is a deficient number, since it is larger than the sum of its proper divisors (9478813983).

20187404193 is a wasteful number, since it uses less digits than its factorization.

20187404193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306704.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 20187404193 in words is "twenty billion, one hundred eighty-seven million, four hundred four thousand, one hundred ninety-three".