18474761 has 2 divisors, whose sum is σ = 18474762. Its totient is φ = 18474760.

The previous prime is 18474751. The next prime is 18474763. The reversal of 18474761 is 16747481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12924025 + 5550736 = 3595^2 + 2356^2 .

It is an emirp because it is prime and its reverse (16747481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18474761 - 2¹⁸ = 18212617 is a prime.

Together with 18474763, 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 (18474763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237380 + 9237381.

It is an arithmetic number, because the mean of its divisors is an integer number (9237381).

Almost surely, 2^18474761 is an apocalyptic number.

It is an amenable number.

18474761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474761 is an equidigital number, since it uses as much as digits as its factorization.

18474761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 18474761 is about 4298.2276580004. The cubic root of 18474761 is about 264.3582954569.

The spelling of 18474761 in words is "eighteen million, four hundred seventy-four thousand, seven hundred sixty-one".