18335385550 has 24 divisors (see below), whose sum is σ = 35203943232. Its totient is φ = 7097568000.

The previous prime is 18335385539. The next prime is 18335385583. The reversal of 18335385550 is 5558353381.

It is a self number, because there is not a number n which added to its sum of digits gives 18335385550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5913091 + ... + 5916190.

It is an arithmetic number, because the mean of its divisors is an integer number (1466830968).

Almost surely, 2^18335385550 is an apocalyptic number.

18335385550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18335385550 is a deficient number, since it is larger than the sum of its proper divisors (16868557682).

18335385550 is a wasteful number, since it uses less digits than its factorization.

18335385550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11829324 (or 11829319 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 18335385550 in words is "eighteen billion, three hundred thirty-five million, three hundred eighty-five thousand, five hundred fifty".