18954017 has 2 divisors, whose sum is σ = 18954018. Its totient is φ = 18954016.

The previous prime is 18953983. The next prime is 18954029. The reversal of 18954017 is 71045981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 2825761 = 4016^2 + 1681^2 .

It is an emirp because it is prime and its reverse (71045981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18954017 - 2¹⁸ = 18691873 is a prime.

It is not a weakly prime, because it can be changed into another prime (18954037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9477008 + 9477009.

It is an arithmetic number, because the mean of its divisors is an integer number (9477009).

Almost surely, 2^18954017 is an apocalyptic number.

It is an amenable number.

18954017 is a deficient number, since it is larger than the sum of its proper divisors (1).

18954017 is an equidigital number, since it uses as much as digits as its factorization.

18954017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 18954017 is about 4353.6211364794. The cubic root of 18954017 is about 266.6247258693.

Adding to 18954017 its reverse (71045981), we get a palindrome (89999998).

The spelling of 18954017 in words is "eighteen million, nine hundred fifty-four thousand, seventeen".