2118625740 has 576 divisors, whose sum is σ = 8687347200. Its totient is φ = 423360000.

The previous prime is 2118625739. The next prime is 2118625753. The reversal of 2118625740 is 475268112.

2118625740 is a `hidden beast` number, since 2 + 1 + 1 + 86 + 2 + 574 + 0 = 666.

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 = 2118625695 and 2118625704.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8440615 + ... + 8440865.

It is an arithmetic number, because the mean of its divisors is an integer number (15082200).

Almost surely, 2^2118625740 is an apocalyptic number.

2118625740 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 2118625740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4343673600).

2118625740 is an abundant number, since it is smaller than the sum of its proper divisors (6568721460).

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

2118625740 is a wasteful number, since it uses less digits than its factorization.

2118625740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 308 counting only the distinct ones).

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

The square root of 2118625740 is about 46028.5318036541. The cubic root of 2118625740 is about 1284.3540162803.

The spelling of 2118625740 in words is "two billion, one hundred eighteen million, six hundred twenty-five thousand, seven hundred forty".