18603043978411 has 4 divisors (see below), whose sum is σ = 18603999421024. Its totient is φ = 18602088535800.

The previous prime is 18603043978399. The next prime is 18603043978427. The reversal of 18603043978411 is 11487934030681.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18603043978411 - 2⁹ = 18603043977899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18603043978111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477692100 + ... + 477731041.

It is an arithmetic number, because the mean of its divisors is an integer number (4650999855256).

Almost surely, 2^{18603043978411} is an apocalyptic number.

18603043978411 is a deficient number, since it is larger than the sum of its proper divisors (955442613).

18603043978411 is an equidigital number, since it uses as much as digits as its factorization.

18603043978411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955442612.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 18603043978411 in words is "eighteen trillion, six hundred three billion, forty-three million, nine hundred seventy-eight thousand, four hundred eleven".