18645129092 has 24 divisors (see below), whose sum is σ = 33116211072. Its totient is φ = 9183574400.

The previous prime is 18645129091. The next prime is 18645129109. The reversal of 18645129092 is 29092154681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18645129091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320492 + ... + 374172.

It is an arithmetic number, because the mean of its divisors is an integer number (1379842128).

Almost surely, 2^18645129092 is an apocalyptic number.

It is an amenable number.

18645129092 is a deficient number, since it is larger than the sum of its proper divisors (14471081980).

18645129092 is a wasteful number, since it uses less digits than its factorization.

18645129092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54979 (or 54977 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 18645129092 in words is "eighteen billion, six hundred forty-five million, one hundred twenty-nine thousand, ninety-two".