2118654720 has 864 divisors, whose sum is σ = 9428170752. Its totient is φ = 427327488.

The previous prime is 2118654719. The next prime is 2118654737. The reversal of 2118654720 is 274568112.

2118654720 is a `hidden beast` number, since 2 + 1 + 186 + 5 + 472 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 45077737 + ... + 45077783.

Almost surely, 2^2118654720 is an apocalyptic number.

2118654720 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 2118654720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4714085376).

2118654720 is an abundant number, since it is smaller than the sum of its proper divisors (7309516032).

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

2118654720 is a wasteful number, since it uses less digits than its factorization.

2118654720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2118654720 is about 46028.8466073179. The cubic root of 2118654720 is about 1284.3598723421.

The spelling of 2118654720 in words is "two billion, one hundred eighteen million, six hundred fifty-four thousand, seven hundred twenty".