18036629856 has 96 divisors (see below), whose sum is σ = 60122119680. Its totient is φ = 5153321088.

The previous prime is 18036629851. The next prime is 18036629867. The reversal of 18036629856 is 65892663081.

It is a happy number.

18036629856 is a `hidden beast` number, since 1 + 8 + 0 + 3 + 6 + 629 + 8 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036629851) 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 15 ways as a sum of consecutive naturals, for example, 1485076 + ... + 1497171.

It is an arithmetic number, because the mean of its divisors is an integer number (626272080).

Almost surely, 2^18036629856 is an apocalyptic number.

18036629856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18036629856 is an abundant number, since it is smaller than the sum of its proper divisors (42085489824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18036629856 is a wasteful number, since it uses less digits than its factorization.

18036629856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982273 (or 2982259 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 18036629856 in words is "eighteen billion, thirty-six million, six hundred twenty-nine thousand, eight hundred fifty-six".