18140397811 has 8 divisors (see below), whose sum is σ = 18774042480. Its totient is φ = 17507294112.

The previous prime is 18140397809. The next prime is 18140397823. The reversal of 18140397811 is 11879304181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18140397811 - 2¹ = 18140397809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18140397871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66405 + ... + 201718.

It is an arithmetic number, because the mean of its divisors is an integer number (2346755310).

Almost surely, 2^18140397811 is an apocalyptic number.

18140397811 is a deficient number, since it is larger than the sum of its proper divisors (633644669).

18140397811 is a wasteful number, since it uses less digits than its factorization.

18140397811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270485.

The product of its (nonzero) digits is 48384, while the sum is 43.

The spelling of 18140397811 in words is "eighteen billion, one hundred forty million, three hundred ninety-seven thousand, eight hundred eleven".