14918381 has 2 divisors, whose sum is σ = 14918382. Its totient is φ = 14918380.

The previous prime is 14918369. The next prime is 14918399. The reversal of 14918381 is 18381941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8497225 + 6421156 = 2915^2 + 2534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14918381 is a prime.

It is a super-2 number, since 2×14918381² = 445116183322322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14918311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7459190 + 7459191.

It is an arithmetic number, because the mean of its divisors is an integer number (7459191).

Almost surely, 2^14918381 is an apocalyptic number.

It is an amenable number.

14918381 is a deficient number, since it is larger than the sum of its proper divisors (1).

14918381 is an equidigital number, since it uses as much as digits as its factorization.

14918381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 14918381 is about 3862.4320058740. The cubic root of 14918381 is about 246.1730830744.

The spelling of 14918381 in words is "fourteen million, nine hundred eighteen thousand, three hundred eighty-one".