16870866731 has 4 divisors (see below), whose sum is σ = 16872909864. Its totient is φ = 16868823600.

The previous prime is 16870866721. The next prime is 16870866737. The reversal of 16870866731 is 13766807861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13766807861 = 199 ⋅69179939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16870866731 is a prime.

It is a super-2 number, since 2×16870866731² (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 (16870866737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009130 + ... + 1025711.

It is an arithmetic number, because the mean of its divisors is an integer number (4218227466).

Almost surely, 2^16870866731 is an apocalyptic number.

16870866731 is a deficient number, since it is larger than the sum of its proper divisors (2043133).

16870866731 is an equidigital number, since it uses as much as digits as its factorization.

16870866731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043132.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 16870866731 in words is "sixteen billion, eight hundred seventy million, eight hundred sixty-six thousand, seven hundred thirty-one".