16931217989418 has 16 divisors (see below), whose sum is σ = 33862482962976. Its totient is φ = 5643731499120.

The previous prime is 16931217989297. The next prime is 16931217989419. The reversal of 16931217989418 is 81498971213961.

It is a super-2 number, since 2×16931217989418² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16931217989419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4232805 + ... + 7195767.

It is an arithmetic number, because the mean of its divisors is an integer number (2116405185186).

Almost surely, 2^{16931217989418} is an apocalyptic number.

16931217989418 is an abundant number, since it is smaller than the sum of its proper divisors (16931264973558).

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

16931217989418 is a wasteful number, since it uses less digits than its factorization.

16931217989418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915349.

The product of its digits is 47029248, while the sum is 69.

The spelling of 16931217989418 in words is "sixteen trillion, nine hundred thirty-one billion, two hundred seventeen million, nine hundred eighty-nine thousand, four hundred eighteen".