18212863 has 2 divisors, whose sum is σ = 18212864. Its totient is φ = 18212862.

The previous prime is 18212861. The next prime is 18212869. The reversal of 18212863 is 36821281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18212863 - 2¹ = 18212861 is a prime.

Together with 18212861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18212861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9106431 + 9106432.

It is an arithmetic number, because the mean of its divisors is an integer number (9106432).

Almost surely, 2^18212863 is an apocalyptic number.

18212863 is a deficient number, since it is larger than the sum of its proper divisors (1).

18212863 is an equidigital number, since it uses as much as digits as its factorization.

18212863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 18212863 is about 4267.6531021160. The cubic root of 18212863 is about 263.1031656833.

The spelling of 18212863 in words is "eighteen million, two hundred twelve thousand, eight hundred sixty-three".