18970177 has 2 divisors, whose sum is σ = 18970178. Its totient is φ = 18970176.

The previous prime is 18970169. The next prime is 18970183. The reversal of 18970177 is 77107981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17007376 + 1962801 = 4124^2 + 1401^2 .

It is an emirp because it is prime and its reverse (77107981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18970177 - 2³ = 18970169 is a prime.

It is a super-2 number, since 2×18970177² = 719735230822658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18970157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9485088 + 9485089.

It is an arithmetic number, because the mean of its divisors is an integer number (9485089).

Almost surely, 2^18970177 is an apocalyptic number.

It is an amenable number.

18970177 is a deficient number, since it is larger than the sum of its proper divisors (1).

18970177 is an equidigital number, since it uses as much as digits as its factorization.

18970177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 18970177 is about 4355.4766673695. The cubic root of 18970177 is about 266.7004781780.

The spelling of 18970177 in words is "eighteen million, nine hundred seventy thousand, one hundred seventy-seven".