16986318621 has 24 divisors (see below), whose sum is σ = 24070725504. Its totient is φ = 10652912640.

The previous prime is 16986318607. The next prime is 16986318623. The reversal of 16986318621 is 12681368961.

It is not a de Polignac number, because 16986318621 - 2¹⁴ = 16986302237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16986318623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2617701 + ... + 2624181.

It is an arithmetic number, because the mean of its divisors is an integer number (1002946896).

Almost surely, 2^16986318621 is an apocalyptic number.

It is an amenable number.

16986318621 is a deficient number, since it is larger than the sum of its proper divisors (7084406883).

16986318621 is a wasteful number, since it uses less digits than its factorization.

16986318621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541 (or 9524 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The spelling of 16986318621 in words is "sixteen billion, nine hundred eighty-six million, three hundred eighteen thousand, six hundred twenty-one".