18849049 has 2 divisors, whose sum is σ = 18849050. Its totient is φ = 18849048.

The previous prime is 18849041. The next prime is 18849071. The reversal of 18849049 is 94094881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14768649 + 4080400 = 3843^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 18849049 - 2³ = 18849041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18848996 and 18849014.

It is not a weakly prime, because it can be changed into another prime (18849041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9424524 + 9424525.

It is an arithmetic number, because the mean of its divisors is an integer number (9424525).

Almost surely, 2^18849049 is an apocalyptic number.

It is an amenable number.

18849049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18849049 is an equidigital number, since it uses as much as digits as its factorization.

18849049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18849049 is about 4341.5491474818. The cubic root of 18849049 is about 266.1316221609.

The spelling of 18849049 in words is "eighteen million, eight hundred forty-nine thousand, forty-nine".