18740405405 has 16 divisors (see below), whose sum is σ = 23477575680. Its totient is φ = 14333561088.

The previous prime is 18740405401. The next prime is 18740405423. The reversal of 18740405405 is 50450404781.

It is a cyclic number.

It is not a de Polignac number, because 18740405405 - 2² = 18740405401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740405401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206564 + ... + 283106.

It is an arithmetic number, because the mean of its divisors is an integer number (1467348480).

Almost surely, 2^18740405405 is an apocalyptic number.

It is an amenable number.

18740405405 is a deficient number, since it is larger than the sum of its proper divisors (4737170275).

18740405405 is a wasteful number, since it uses less digits than its factorization.

18740405405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78700.

The product of its (nonzero) digits is 89600, while the sum is 38.

The spelling of 18740405405 in words is "eighteen billion, seven hundred forty million, four hundred five thousand, four hundred five".