18121301670 has 128 divisors (see below), whose sum is σ = 45780940800. Its totient is φ = 4585185792.

The previous prime is 18121301669. The next prime is 18121301677. The reversal of 18121301670 is 7610312181.

18121301670 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18121301677) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21858816 + ... + 21859644.

It is an arithmetic number, because the mean of its divisors is an integer number (357663600).

Almost surely, 2^18121301670 is an apocalyptic number.

18121301670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18121301670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22890470400).

18121301670 is an abundant number, since it is smaller than the sum of its proper divisors (27659639130).

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

18121301670 is a wasteful number, since it uses less digits than its factorization.

18121301670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its (nonzero) digits is 2016, while the sum is 30.

The spelling of 18121301670 in words is "eighteen billion, one hundred twenty-one million, three hundred one thousand, six hundred seventy".