16870207181 has 2 divisors, whose sum is σ = 16870207182. Its totient is φ = 16870207180.

The previous prime is 16870207127. The next prime is 16870207253. The reversal of 16870207181 is 18170207861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13932025156 + 2938182025 = 118034^2 + 54205^2 .

It is a cyclic number.

It is not a de Polignac number, because 16870207181 - 2¹⁴ = 16870190797 is a prime.

It is a super-2 number, since 2×16870207181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16870207681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8435103590 + 8435103591.

It is an arithmetic number, because the mean of its divisors is an integer number (8435103591).

Almost surely, 2^16870207181 is an apocalyptic number.

It is an amenable number.

16870207181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16870207181 is an equidigital number, since it uses as much as digits as its factorization.

16870207181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37632, while the sum is 41.

The spelling of 16870207181 in words is "sixteen billion, eight hundred seventy million, two hundred seven thousand, one hundred eighty-one".