18949241 has 4 divisors (see below), whose sum is σ = 19144692. Its totient is φ = 18753792.

The previous prime is 18949211. The next prime is 18949243. The reversal of 18949241 is 14294981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 16321600 = 1621^2 + 4040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18949241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18949195 and 18949204.

It is not an unprimeable number, because it can be changed into a prime (18949243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97580 + ... + 97773.

It is an arithmetic number, because the mean of its divisors is an integer number (4786173).

Almost surely, 2^18949241 is an apocalyptic number.

It is an amenable number.

18949241 is a deficient number, since it is larger than the sum of its proper divisors (195451).

18949241 is an equidigital number, since it uses as much as digits as its factorization.

18949241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195450.

The product of its digits is 20736, while the sum is 38.

The square root of 18949241 is about 4353.0725930083. The cubic root of 18949241 is about 266.6023294442.

The spelling of 18949241 in words is "eighteen million, nine hundred forty-nine thousand, two hundred forty-one".