16857181933 has 8 divisors (see below), whose sum is σ = 16932146616. Its totient is φ = 16782259200.

The previous prime is 16857181909. The next prime is 16857181937. The reversal of 16857181933 is 33918175861.

It can be written as a sum of positive squares in 4 ways, for example, as 4545726084 + 12311455849 = 67422^2 + 110957^2 .

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-16857181933 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 (16857181937) 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, 1013835 + ... + 1030327.

It is an arithmetic number, because the mean of its divisors is an integer number (2116518327).

Almost surely, 2^16857181933 is an apocalyptic number.

It is an amenable number.

16857181933 is a deficient number, since it is larger than the sum of its proper divisors (74964683).

16857181933 is a wasteful number, since it uses less digits than its factorization.

16857181933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20975.

The product of its digits is 1088640, while the sum is 52.

The spelling of 16857181933 in words is "sixteen billion, eight hundred fifty-seven million, one hundred eighty-one thousand, nine hundred thirty-three".