16912920187 has 8 divisors (see below), whose sum is σ = 17376256656. Its totient is φ = 16449911712.

The previous prime is 16912920149. The next prime is 16912920197. The reversal of 16912920187 is 78102921961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16912920187 is a prime.

It is a super-2 number, since 2×16912920187² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16912920107) 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, 24408 + ... + 185530.

It is an arithmetic number, because the mean of its divisors is an integer number (2172032082).

Almost surely, 2^16912920187 is an apocalyptic number.

16912920187 is a deficient number, since it is larger than the sum of its proper divisors (463336469).

16912920187 is a wasteful number, since it uses less digits than its factorization.

16912920187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163997.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 16912920187 in words is "sixteen billion, nine hundred twelve million, nine hundred twenty thousand, one hundred eighty-seven".