18039577 has 2 divisors, whose sum is σ = 18039578. Its totient is φ = 18039576.

The previous prime is 18039563. The next prime is 18039583. The reversal of 18039577 is 77593081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10137856 + 7901721 = 3184^2 + 2811^2 .

It is a cyclic number.

It is not a de Polignac number, because 18039577 - 2⁷ = 18039449 is a prime.

It is not a weakly prime, because it can be changed into another prime (18039277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9019788 + 9019789.

It is an arithmetic number, because the mean of its divisors is an integer number (9019789).

Almost surely, 2^18039577 is an apocalyptic number.

It is an amenable number.

18039577 is a deficient number, since it is larger than the sum of its proper divisors (1).

18039577 is an equidigital number, since it uses as much as digits as its factorization.

18039577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 18039577 is about 4247.3023202970. The cubic root of 18039577 is about 262.2660748967.

The spelling of 18039577 in words is "eighteen million, thirty-nine thousand, five hundred seventy-seven".