18202141 has 2 divisors, whose sum is σ = 18202142. Its totient is φ = 18202140.

The previous prime is 18202139. The next prime is 18202181. The reversal of 18202141 is 14120281.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18096516 + 105625 = 4254^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 18202141 - 2¹ = 18202139 is a prime.

Together with 18202139, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1163332 and since 18202141 and 1163332 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18202181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9101070 + 9101071.

It is an arithmetic number, because the mean of its divisors is an integer number (9101071).

Almost surely, 2^18202141 is an apocalyptic number.

It is an amenable number.

18202141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18202141 is an equidigital number, since it uses as much as digits as its factorization.

18202141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 18202141 is about 4266.3967232314. The cubic root of 18202141 is about 263.0515255156.

The spelling of 18202141 in words is "eighteen million, two hundred two thousand, one hundred forty-one".