18421113043 has 16 divisors (see below), whose sum is σ = 19327666176. Its totient is φ = 17535942720.

The previous prime is 18421113041. The next prime is 18421113107. The reversal of 18421113043 is 34031112481.

It is a cyclic number.

It is not a de Polignac number, because 18421113043 - 2¹ = 18421113041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18421113041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584146 + ... + 614872.

It is an arithmetic number, because the mean of its divisors is an integer number (1207979136).

Almost surely, 2^18421113043 is an apocalyptic number.

18421113043 is a deficient number, since it is larger than the sum of its proper divisors (906553133).

18421113043 is a wasteful number, since it uses less digits than its factorization.

18421113043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31074.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 18421113043 in words is "eighteen billion, four hundred twenty-one million, one hundred thirteen thousand, forty-three".