17967984011 has 4 divisors (see below), whose sum is σ = 18913667400. Its totient is φ = 17022300624.

The previous prime is 17967983983. The next prime is 17967984043. The reversal of 17967984011 is 11048976971.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17967984011 - 2¹⁸ = 17967721867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17967984061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472841666 + ... + 472841703.

It is an arithmetic number, because the mean of its divisors is an integer number (4728416850).

Almost surely, 2^17967984011 is an apocalyptic number.

17967984011 is a deficient number, since it is larger than the sum of its proper divisors (945683389).

17967984011 is an equidigital number, since it uses as much as digits as its factorization.

17967984011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945683388.

The product of its (nonzero) digits is 762048, while the sum is 53.

The spelling of 17967984011 in words is "seventeen billion, nine hundred sixty-seven million, nine hundred eighty-four thousand, eleven".