18676481 has 2 divisors, whose sum is σ = 18676482. Its totient is φ = 18676480.

The previous prime is 18676459. The next prime is 18676501. The reversal of 18676481 is 18467681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15085456 + 3591025 = 3884^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 18676481 - 2¹⁰ = 18675457 is a prime.

It is a super-2 number, since 2×18676481² = 697621885086722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18676381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9338240 + 9338241.

It is an arithmetic number, because the mean of its divisors is an integer number (9338241).

Almost surely, 2^18676481 is an apocalyptic number.

It is an amenable number.

18676481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18676481 is an equidigital number, since it uses as much as digits as its factorization.

18676481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 18676481 is about 4321.6294380708. The cubic root of 18676481 is about 265.3169626118.

It can be divided in two parts, 186 and 76481, that added together give a palindrome (76667).

The spelling of 18676481 in words is "eighteen million, six hundred seventy-six thousand, four hundred eighty-one".