18121463 has 2 divisors, whose sum is σ = 18121464. Its totient is φ = 18121462.

The previous prime is 18121429. The next prime is 18121469. The reversal of 18121463 is 36412181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18121463 - 2⁶ = 18121399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18121469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9060731 + 9060732.

It is an arithmetic number, because the mean of its divisors is an integer number (9060732).

Almost surely, 2^18121463 is an apocalyptic number.

18121463 is a deficient number, since it is larger than the sum of its proper divisors (1).

18121463 is an equidigital number, since it uses as much as digits as its factorization.

18121463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 18121463 is about 4256.9311716306. The cubic root of 18121463 is about 262.6623056714.

The spelling of 18121463 in words is "eighteen million, one hundred twenty-one thousand, four hundred sixty-three".