2018644992 has 528 divisors, whose sum is σ = 7510688640. Its totient is φ = 507838464.

The previous prime is 2018644951. The next prime is 2018644993. The reversal of 2018644992 is 2994468102.

2018644992 is a `hidden beast` number, since 20 + 186 + 449 + 9 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2018644993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24320983 + ... + 24321065.

Almost surely, 2^2018644992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2018644992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3755344320).

2018644992 is an abundant number, since it is smaller than the sum of its proper divisors (5492043648).

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

2018644992 is a wasteful number, since it uses less digits than its factorization.

2018644992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2018644992 is about 44929.3333135492. Note that the first 4 decimals coincide. The cubic root of 2018644992 is about 1263.8241490128.

The spelling of 2018644992 in words is "two billion, eighteen million, six hundred forty-four thousand, nine hundred ninety-two".