18966097905 has 16 divisors (see below), whose sum is σ = 30347472960. Its totient is φ = 10114680128.

The previous prime is 18966097897. The next prime is 18966097907. The reversal of 18966097905 is 50979066981.

It is a cyclic number.

It is not a de Polignac number, because 18966097905 - 2³ = 18966097897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18966097907) 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, 460291 + ... + 499799.

It is an arithmetic number, because the mean of its divisors is an integer number (1896717060).

Almost surely, 2^18966097905 is an apocalyptic number.

18966097905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18966097905 is a deficient number, since it is larger than the sum of its proper divisors (11381375055).

18966097905 is a wasteful number, since it uses less digits than its factorization.

18966097905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71520.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The spelling of 18966097905 in words is "eighteen billion, nine hundred sixty-six million, ninety-seven thousand, nine hundred five".