17985346890 has 64 divisors (see below), whose sum is σ = 49543094016. Its totient is φ = 4093281792.

The previous prime is 17985346879. The next prime is 17985346903. The reversal of 17985346890 is 9864358971.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134857 + ... + 232716.

It is an arithmetic number, because the mean of its divisors is an integer number (774110844).

Almost surely, 2^17985346890 is an apocalyptic number.

17985346890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

17985346890 is an abundant number, since it is smaller than the sum of its proper divisors (31557747126).

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

17985346890 is a wasteful number, since it uses less digits than its factorization.

17985346890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367823.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 17985346890 in words is "seventeen billion, nine hundred eighty-five million, three hundred forty-six thousand, eight hundred ninety".