618740020 has 96 divisors (see below), whose sum is σ = 1417409280. Its totient is φ = 226237440.

The previous prime is 618740009. The next prime is 618740047. The reversal of 618740020 is 20047816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 999271 + ... + 999889.

It is an arithmetic number, because the mean of its divisors is an integer number (14764680).

Almost surely, 2^618740020 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 618740020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708704640).

618740020 is an abundant number, since it is smaller than the sum of its proper divisors (798669260).

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

618740020 is a wasteful number, since it uses less digits than its factorization.

618740020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 618740020 is about 24874.4853213087. The cubic root of 618740020 is about 852.1238789949.

Adding to 618740020 its reverse (20047816), we get a palindrome (638787836).

The spelling of 618740020 in words is "six hundred eighteen million, seven hundred forty thousand, twenty".