16986931205 has 16 divisors (see below), whose sum is σ = 20440594944. Its totient is φ = 13552072320.

The previous prime is 16986931189. The next prime is 16986931207. The reversal of 16986931205 is 50213968961.

It is a happy number.

It is not a de Polignac number, because 16986931205 - 2⁴ = 16986931189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986931207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6137732 + ... + 6140498.

It is an arithmetic number, because the mean of its divisors is an integer number (1277537184).

Almost surely, 2^16986931205 is an apocalyptic number.

It is an amenable number.

16986931205 is a deficient number, since it is larger than the sum of its proper divisors (3453663739).

16986931205 is a wasteful number, since it uses less digits than its factorization.

16986931205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716.

The product of its (nonzero) digits is 699840, while the sum is 50.

It can be divided in two parts, 1698693120 and 5, that multiplied together give a square (8493465600 = 92160²).

The spelling of 16986931205 in words is "sixteen billion, nine hundred eighty-six million, nine hundred thirty-one thousand, two hundred five".