18498061 has 2 divisors, whose sum is σ = 18498062. Its totient is φ = 18498060.

The previous prime is 18498059. The next prime is 18498083. The reversal of 18498061 is 16089481.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12709225 + 5788836 = 3565^2 + 2406^2 .

It is an emirp because it is prime and its reverse (16089481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18498061 - 2¹ = 18498059 is a prime.

Together with 18498059, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 18498061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18498031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9249030 + 9249031.

It is an arithmetic number, because the mean of its divisors is an integer number (9249031).

Almost surely, 2^18498061 is an apocalyptic number.

It is an amenable number.

18498061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18498061 is an equidigital number, since it uses as much as digits as its factorization.

18498061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 18498061 is about 4300.9372234433. The cubic root of 18498061 is about 264.4693832389.

The spelling of 18498061 in words is "eighteen million, four hundred ninety-eight thousand, sixty-one".