20018536827 has 4 divisors (see below), whose sum is σ = 26691382440. Its totient is φ = 13345691216.

The previous prime is 20018536799. The next prime is 20018536883. The reversal of 20018536827 is 72863581002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20018536827 - 2²⁰ = 20017488251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20018036827) 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 3 ways as a sum of consecutive naturals, for example, 3336422802 + ... + 3336422807.

It is an arithmetic number, because the mean of its divisors is an integer number (6672845610).

Almost surely, 2^20018536827 is an apocalyptic number.

20018536827 is a deficient number, since it is larger than the sum of its proper divisors (6672845613).

20018536827 is an equidigital number, since it uses as much as digits as its factorization.

20018536827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672845612.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 20018536827 in words is "twenty billion, eighteen million, five hundred thirty-six thousand, eight hundred twenty-seven".