18619241 has 2 divisors, whose sum is σ = 18619242. Its totient is φ = 18619240.

The previous prime is 18619219. The next prime is 18619277. The reversal of 18619241 is 14291681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 16 = 4315^2 + 4^2 .

It is an emirp because it is prime and its reverse (14291681) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18619241 is a prime.

It is a super-2 number, since 2×18619241² = 693352270832162, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18619198 and 18619207.

It is not a weakly prime, because it can be changed into another prime (18613241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9309620 + 9309621.

It is an arithmetic number, because the mean of its divisors is an integer number (9309621).

Almost surely, 2^18619241 is an apocalyptic number.

It is an amenable number.

18619241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18619241 is an equidigital number, since it uses as much as digits as its factorization.

18619241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 18619241 is about 4315.0018539973. The cubic root of 18619241 is about 265.0456359046.

The spelling of 18619241 in words is "eighteen million, six hundred nineteen thousand, two hundred forty-one".