18909918735 has 16 divisors (see below), whose sum is σ = 30261903360. Its totient is φ = 10083278880.

The previous prime is 18909918697. The next prime is 18909918751. The reversal of 18909918735 is 53781990981.

It is not a de Polignac number, because 18909918735 - 2⁸ = 18909918479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46351 + ... + 199920.

It is an arithmetic number, because the mean of its divisors is an integer number (1891368960).

Almost surely, 2^18909918735 is an apocalyptic number.

18909918735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18909918735 is a deficient number, since it is larger than the sum of its proper divisors (11351984625).

18909918735 is a wasteful number, since it uses less digits than its factorization.

18909918735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251398.

The product of its (nonzero) digits is 4898880, while the sum is 60.

The spelling of 18909918735 in words is "eighteen billion, nine hundred nine million, nine hundred eighteen thousand, seven hundred thirty-five".