18849541 has 2 divisors, whose sum is σ = 18849542. Its totient is φ = 18849540.

The previous prime is 18849533. The next prime is 18849547. The reversal of 18849541 is 14594881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14630625 + 4218916 = 3825^2 + 2054^2 .

It is a cyclic number.

It is not a de Polignac number, because 18849541 - 2³ = 18849533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18849494 and 18849503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18849547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9424770 + 9424771.

It is an arithmetic number, because the mean of its divisors is an integer number (9424771).

Almost surely, 2^18849541 is an apocalyptic number.

It is an amenable number.

18849541 is a deficient number, since it is larger than the sum of its proper divisors (1).

18849541 is an equidigital number, since it uses as much as digits as its factorization.

18849541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 40.

The square root of 18849541 is about 4341.6058089145. The cubic root of 18849541 is about 266.1339376733.

It can be divided in two parts, 188 and 49541, that added together give a square (49729 = 223²).

The spelling of 18849541 in words is "eighteen million, eight hundred forty-nine thousand, five hundred forty-one".