18143281810 has 16 divisors (see below), whose sum is σ = 32706158616. Its totient is φ = 7246590208.

The previous prime is 18143281781. The next prime is 18143281837. The reversal of 18143281810 is 1818234181.

It is a Cunningham number, because it is equal to 134697²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 18036221401 + 107060409 = 134299^2 + 10347^2 .

It is a super-2 number, since 2×18143281810² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18143281810.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1333207 + ... + 1346746.

Almost surely, 2^18143281810 is an apocalyptic number.

18143281810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18143281810 is a deficient number, since it is larger than the sum of its proper divisors (14562876806).

18143281810 is a wasteful number, since it uses less digits than its factorization.

18143281810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680637.

The product of its (nonzero) digits is 12288, while the sum is 37.

The spelling of 18143281810 in words is "eighteen billion, one hundred forty-three million, two hundred eighty-one thousand, eight hundred ten".