16900181 has 2 divisors, whose sum is σ = 16900182. Its totient is φ = 16900180.

The previous prime is 16900171. The next prime is 16900199. The reversal of 16900181 is 18100961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 828100 = 4009^2 + 910^2 .

It is an emirp because it is prime and its reverse (18100961) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16900181 is a prime.

It is a super-2 number, since 2×16900181² = 571232235665522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16900181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16900141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8450090 + 8450091.

It is an arithmetic number, because the mean of its divisors is an integer number (8450091).

Almost surely, 2^16900181 is an apocalyptic number.

It is an amenable number.

16900181 is a deficient number, since it is larger than the sum of its proper divisors (1).

16900181 is an equidigital number, since it uses as much as digits as its factorization.

16900181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 16900181 is about 4110.9829724775. The cubic root of 16900181 is about 256.6239105332.

The spelling of 16900181 in words is "sixteen million, nine hundred thousand, one hundred eighty-one".