18435154421411 has 16 divisors (see below), whose sum is σ = 22692138081984. Its totient is φ = 14584309438464.

The previous prime is 18435154421329. The next prime is 18435154421413. The reversal of 18435154421411 is 11412445153481.

It is a cyclic number.

It is not a de Polignac number, because 18435154421411 - 2¹⁰ = 18435154420387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18435154421413) 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, 11366306 + ... + 12886551.

It is an arithmetic number, because the mean of its divisors is an integer number (1418258630124).

Almost surely, 2^{18435154421411} is an apocalyptic number.

18435154421411 is a deficient number, since it is larger than the sum of its proper divisors (4256983660573).

18435154421411 is a wasteful number, since it uses less digits than its factorization.

18435154421411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24261230.

The product of its digits is 307200, while the sum is 44.

Adding to 18435154421411 its reverse (11412445153481), we get a palindrome (29847599574892).

The spelling of 18435154421411 in words is "eighteen trillion, four hundred thirty-five billion, one hundred fifty-four million, four hundred twenty-one thousand, four hundred eleven".