18141471881 has 16 divisors (see below), whose sum is σ = 20431958400. Its totient is φ = 15982095360.

The previous prime is 18141471863. The next prime is 18141471883. The reversal of 18141471881 is 18817414181.

It is a cyclic number.

It is not a de Polignac number, because 18141471881 - 2¹⁰ = 18141470857 is a prime.

It is a super-2 number, since 2×18141471881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18141471883) 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, 66686 + ... + 201816.

It is an arithmetic number, because the mean of its divisors is an integer number (1276997400).

Almost surely, 2^18141471881 is an apocalyptic number.

It is an amenable number.

18141471881 is a deficient number, since it is larger than the sum of its proper divisors (2290486519).

18141471881 is a wasteful number, since it uses less digits than its factorization.

18141471881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135616.

The product of its digits is 57344, while the sum is 44.

The spelling of 18141471881 in words is "eighteen billion, one hundred forty-one million, four hundred seventy-one thousand, eight hundred eighty-one".