18856141 has 2 divisors, whose sum is σ = 18856142. Its totient is φ = 18856140.

The previous prime is 18856139. The next prime is 18856147. The reversal of 18856141 is 14165881.

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., 15634116 + 3222025 = 3954^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 18856141 - 2¹ = 18856139 is a prime.

Together with 18856139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18856097 and 18856106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18856147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9428070 + 9428071.

It is an arithmetic number, because the mean of its divisors is an integer number (9428071).

Almost surely, 2^18856141 is an apocalyptic number.

It is an amenable number.

18856141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18856141 is an equidigital number, since it uses as much as digits as its factorization.

18856141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The square root of 18856141 is about 4342.3658298213. The cubic root of 18856141 is about 266.1649955299.

The spelling of 18856141 in words is "eighteen million, eight hundred fifty-six thousand, one hundred forty-one".