18381035481 has 8 divisors (see below), whose sum is σ = 24508674624. Its totient is φ = 12253710000.

The previous prime is 18381035479. The next prime is 18381035509. The reversal of 18381035481 is 18453018381.

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

It is not a de Polignac number, because 18381035481 - 2¹ = 18381035479 is a prime.

It is a super-2 number, since 2×18381035481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18381035441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179715 + ... + 262791.

It is an arithmetic number, because the mean of its divisors is an integer number (3063584328).

Almost surely, 2^18381035481 is an apocalyptic number.

It is an amenable number.

18381035481 is a deficient number, since it is larger than the sum of its proper divisors (6127639143).

18381035481 is an equidigital number, since it uses as much as digits as its factorization.

18381035481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156831.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 18381035481 in words is "eighteen billion, three hundred eighty-one million, thirty-five thousand, four hundred eighty-one".