20875297185 has 16 divisors (see below), whose sum is σ = 37111639680. Its totient is φ = 11133491760.

The previous prime is 20875297141. The next prime is 20875297217. The reversal of 20875297185 is 58179257802.

20875297185 is a `hidden beast` number, since 20 + 87 + 529 + 7 + 18 + 5 = 666.

It is not a de Polignac number, because 20875297185 - 2¹¹ = 20875295137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77315781 + ... + 77316050.

It is an arithmetic number, because the mean of its divisors is an integer number (2319477480).

Almost surely, 2^20875297185 is an apocalyptic number.

It is an amenable number.

20875297185 is a deficient number, since it is larger than the sum of its proper divisors (16236342495).

20875297185 is a wasteful number, since it uses less digits than its factorization.

20875297185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154631845 (or 154631839 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 20875297185 in words is "twenty billion, eight hundred seventy-five million, two hundred ninety-seven thousand, one hundred eighty-five".