18050381 has 2 divisors, whose sum is σ = 18050382. Its totient is φ = 18050380.

The previous prime is 18050341. The next prime is 18050419. The reversal of 18050381 is 18305081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 902500 = 4141^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 18050381 - 2⁶ = 18050317 is a prime.

It is a super-2 number, since 2×18050381² = 651632508490322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18050381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18050321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9025190 + 9025191.

It is an arithmetic number, because the mean of its divisors is an integer number (9025191).

Almost surely, 2^18050381 is an apocalyptic number.

It is an amenable number.

18050381 is a deficient number, since it is larger than the sum of its proper divisors (1).

18050381 is an equidigital number, since it uses as much as digits as its factorization.

18050381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18050381 is about 4248.5739960603. The cubic root of 18050381 is about 262.3184219702.

The spelling of 18050381 in words is "eighteen million, fifty thousand, three hundred eighty-one".