20018336870185 has 16 divisors (see below), whose sum is σ = 24698710939392. Its totient is φ = 15566414371200.

The previous prime is 20018336870179. The next prime is 20018336870209. The reversal of 20018336870185 is 58107863381002.

It is a happy number.

It is not a de Polignac number, because 20018336870185 - 2³ = 20018336870177 is a prime.

It is a super-2 number, since 2×20018336870185² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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, 180111279 + ... + 180222388.

It is an arithmetic number, because the mean of its divisors is an integer number (1543669433712).

Almost surely, 2^{20018336870185} is an apocalyptic number.

It is an amenable number.

20018336870185 is a deficient number, since it is larger than the sum of its proper divisors (4680374069207).

20018336870185 is a wasteful number, since it uses less digits than its factorization.

20018336870185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360333984.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 20018336870185 in words is "twenty trillion, eighteen billion, three hundred thirty-six million, eight hundred seventy thousand, one hundred eighty-five".