18813077 has 2 divisors, whose sum is σ = 18813078. Its totient is φ = 18813076.

The previous prime is 18813043. The next prime is 18813089. The reversal of 18813077 is 77031881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18541636 + 271441 = 4306^2 + 521^2 .

It is an emirp because it is prime and its reverse (77031881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18813077 - 2⁶ = 18813013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18813007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9406538 + 9406539.

It is an arithmetic number, because the mean of its divisors is an integer number (9406539).

Almost surely, 2^18813077 is an apocalyptic number.

It is an amenable number.

18813077 is a deficient number, since it is larger than the sum of its proper divisors (1).

18813077 is an equidigital number, since it uses as much as digits as its factorization.

18813077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 18813077 is about 4337.4044081686. The cubic root of 18813077 is about 265.9622169185.

The spelling of 18813077 in words is "eighteen million, eight hundred thirteen thousand, seventy-seven".