2018729340 has 72 divisors (see below), whose sum is σ = 6141019248. Its totient is φ = 536785920.

The previous prime is 2018729333. The next prime is 2018729369. The reversal of 2018729340 is 439278102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2018729295 and 2018729304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47655 + ... + 79425.

It is an arithmetic number, because the mean of its divisors is an integer number (85291934).

Almost surely, 2^2018729340 is an apocalyptic number.

2018729340 is a gapful number since it is divisible by the number (20) 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 2018729340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3070509624).

2018729340 is an abundant number, since it is smaller than the sum of its proper divisors (4122289908).

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

2018729340 is a wasteful number, since it uses less digits than its factorization.

2018729340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32139 (or 32134 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2018729340 is about 44930.2719778102. The cubic root of 2018729340 is about 1263.8417515060.

The spelling of 2018729340 in words is "two billion, eighteen million, seven hundred twenty-nine thousand, three hundred forty".