18601481 has 2 divisors, whose sum is σ = 18601482. Its totient is φ = 18601480.

The previous prime is 18601459. The next prime is 18601483. The reversal of 18601481 is 18410681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18139081 + 462400 = 4259^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 18601481 - 2¹⁸ = 18339337 is a prime.

It is a super-2 number, since 2×18601481² = 692030190786722, which contains 22 as substring.

Together with 18601483, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18601483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9300740 + 9300741.

It is an arithmetic number, because the mean of its divisors is an integer number (9300741).

Almost surely, 2^18601481 is an apocalyptic number.

It is an amenable number.

18601481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18601481 is an equidigital number, since it uses as much as digits as its factorization.

18601481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 18601481 is about 4312.9434264780. The cubic root of 18601481 is about 264.9613376609.

The spelling of 18601481 in words is "eighteen million, six hundred one thousand, four hundred eighty-one".