20118536 has 32 divisors (see below), whose sum is σ = 39160800. Its totient is φ = 9682560.

The previous prime is 20118533. The next prime is 20118541. The reversal of 20118536 is 63581102.

It is not an unprimeable number, because it can be changed into a prime (20118533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26855 + ... + 27593.

It is an arithmetic number, because the mean of its divisors is an integer number (1223775).

Almost surely, 2^20118536 is an apocalyptic number.

It is an amenable number.

20118536 is a deficient number, since it is larger than the sum of its proper divisors (19042264).

20118536 is a wasteful number, since it uses less digits than its factorization.

20118536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 20118536 is about 4485.3691040983. The cubic root of 20118536 is about 271.9769660425.

Adding to 20118536 its reverse (63581102), we get a palindrome (83699638).

The spelling of 20118536 in words is "twenty million, one hundred eighteen thousand, five hundred thirty-six".