18461347 has 2 divisors, whose sum is σ = 18461348. Its totient is φ = 18461346.

The previous prime is 18461329. The next prime is 18461353. The reversal of 18461347 is 74316481.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18461347 is a prime.

It is not a weakly prime, because it can be changed into another prime (18461327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9230673 + 9230674.

It is an arithmetic number, because the mean of its divisors is an integer number (9230674).

Almost surely, 2^18461347 is an apocalyptic number.

18461347 is a deficient number, since it is larger than the sum of its proper divisors (1).

18461347 is an equidigital number, since it uses as much as digits as its factorization.

18461347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 18461347 is about 4296.6669640548. Note that the first 3 decimals coincide. The cubic root of 18461347 is about 264.2942989455.

The spelling of 18461347 in words is "eighteen million, four hundred sixty-one thousand, three hundred forty-seven".