2018731680 has 384 divisors, whose sum is σ = 8137704960. Its totient is φ = 457850880.

The previous prime is 2018731679. The next prime is 2018731697. The reversal of 2018731680 is 861378102.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7287702 + ... + 7287978.

It is an arithmetic number, because the mean of its divisors is an integer number (21191940).

Almost surely, 2^2018731680 is an apocalyptic number.

2018731680 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 2018731680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4068852480).

2018731680 is an abundant number, since it is smaller than the sum of its proper divisors (6118973280).

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

2018731680 is a wasteful number, since it uses less digits than its factorization.

2018731680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2018731680 is about 44930.2980181525. The cubic root of 2018731680 is about 1263.8422398311.

The spelling of 2018731680 in words is "two billion, eighteen million, seven hundred thirty-one thousand, six hundred eighty".