18945129 has 16 divisors (see below), whose sum is σ = 28965248. Its totient is φ = 10789632.

The previous prime is 18945127. The next prime is 18945131. The reversal of 18945129 is 92154981.

It is an interprime number because it is at equal distance from previous prime (18945127) and next prime (18945131).

It is not a de Polignac number, because 18945129 - 2¹ = 18945127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18945127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5739 + ... + 8415.

It is an arithmetic number, because the mean of its divisors is an integer number (1810328).

Almost surely, 2^18945129 is an apocalyptic number.

It is an amenable number.

18945129 is a deficient number, since it is larger than the sum of its proper divisors (10020119).

18945129 is a wasteful number, since it uses less digits than its factorization.

18945129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its digits is 25920, while the sum is 39.

The square root of 18945129 is about 4352.6002573175. The cubic root of 18945129 is about 266.5830437450.

Subtracting from 18945129 its sum of digits (39), we obtain a triangular number (18945090 = T₆₁₅₅).

The spelling of 18945129 in words is "eighteen million, nine hundred forty-five thousand, one hundred twenty-nine".