18945127 has 2 divisors, whose sum is σ = 18945128. Its totient is φ = 18945126.

The previous prime is 18945119. The next prime is 18945131. The reversal of 18945127 is 72154981.

It is a strong prime.

It is an emirp because it is prime and its reverse (72154981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18945127 - 2³ = 18945119 is a prime.

It is a super-2 number, since 2×18945127² = 717835674092258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18945107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9472563 + 9472564.

It is an arithmetic number, because the mean of its divisors is an integer number (9472564).

Almost surely, 2^18945127 is an apocalyptic number.

18945127 is a deficient number, since it is larger than the sum of its proper divisors (1).

18945127 is an equidigital number, since it uses as much as digits as its factorization.

18945127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 18945127 is about 4352.6000275697. The cubic root of 18945127 is about 266.5830343642.

Subtracting from 18945127 its sum of digits (37), we obtain a triangular number (18945090 = T₆₁₅₅).

It can be divided in two parts, 1894 and 5127, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 18945127 in words is "eighteen million, nine hundred forty-five thousand, one hundred twenty-seven".