18036535 has 16 divisors (see below), whose sum is σ = 23703840. Its totient is φ = 13066240.

The previous prime is 18036533. The next prime is 18036539. The reversal of 18036535 is 53563081.

It is not a de Polignac number, because 18036535 - 2¹ = 18036533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18036497 and 18036506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18951 + ... + 19879.

It is an arithmetic number, because the mean of its divisors is an integer number (1481490).

Almost surely, 2^18036535 is an apocalyptic number.

18036535 is a deficient number, since it is larger than the sum of its proper divisors (5667305).

18036535 is a wasteful number, since it uses less digits than its factorization.

18036535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 18036535 is about 4246.9441955364. The cubic root of 18036535 is about 262.2513321591.

It can be divided in two parts, 1803 and 6535, that added together give a palindrome (8338).

The spelling of 18036535 in words is "eighteen million, thirty-six thousand, five hundred thirty-five".