18131410820 has 96 divisors (see below), whose sum is σ = 41487774720. Its totient is φ = 6630750720.

The previous prime is 18131410799. The next prime is 18131410841. The reversal of 18131410820 is 2801413181.

It is an interprime number because it is at equal distance from previous prime (18131410799) and next prime (18131410841).

It is a super-2 number, since 2×18131410820² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4674722 + ... + 4678598.

It is an arithmetic number, because the mean of its divisors is an integer number (432164320).

Almost surely, 2^18131410820 is an apocalyptic number.

18131410820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18131410820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20743887360).

18131410820 is an abundant number, since it is smaller than the sum of its proper divisors (23356363900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18131410820 is a wasteful number, since it uses less digits than its factorization.

18131410820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333 (or 4331 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The spelling of 18131410820 in words is "eighteen billion, one hundred thirty-one million, four hundred ten thousand, eight hundred twenty".