16833349987 has 4 divisors (see below), whose sum is σ = 16982317800. Its totient is φ = 16684382176.

The previous prime is 16833349961. The next prime is 16833349993. The reversal of 16833349987 is 78994333861.

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 16833349987 - 2⁷ = 16833349859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16833349997) 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, 74483737 + ... + 74483962.

It is an arithmetic number, because the mean of its divisors is an integer number (4245579450).

Almost surely, 2^16833349987 is an apocalyptic number.

16833349987 is a deficient number, since it is larger than the sum of its proper divisors (148967813).

16833349987 is a wasteful number, since it uses less digits than its factorization.

16833349987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148967812.

The product of its digits is 23514624, while the sum is 61.

The spelling of 16833349987 in words is "sixteen billion, eight hundred thirty-three million, three hundred forty-nine thousand, nine hundred eighty-seven".