17985738903 has 32 divisors (see below), whose sum is σ = 27781781760. Its totient is φ = 10235312640.

The previous prime is 17985738889. The next prime is 17985738907. The reversal of 17985738903 is 30983758971.

It is not a de Polignac number, because 17985738903 - 2⁸ = 17985738647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17985738907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56076 + ... + 197777.

It is an arithmetic number, because the mean of its divisors is an integer number (868180680).

Almost surely, 2^17985738903 is an apocalyptic number.

17985738903 is a deficient number, since it is larger than the sum of its proper divisors (9796042857).

17985738903 is a wasteful number, since it uses less digits than its factorization.

17985738903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253999.

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 17985738903 in words is "seventeen billion, nine hundred eighty-five million, seven hundred thirty-eight thousand, nine hundred three".