2102742720 has 448 divisors, whose sum is σ = 8112800640. Its totient is φ = 509607936.

The previous prime is 2102742647. The next prime is 2102742721. The reversal of 2102742720 is 272472012.

2102742720 is a `hidden beast` number, since 210 + 2 + 7 + 427 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2102742721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10894944 + ... + 10895136.

It is an arithmetic number, because the mean of its divisors is an integer number (18108930).

Almost surely, 2^2102742720 is an apocalyptic number.

2102742720 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 2102742720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4056400320).

2102742720 is an abundant number, since it is smaller than the sum of its proper divisors (6010057920).

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

2102742720 is a wasteful number, since it uses less digits than its factorization.

2102742720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 2102742720 is about 45855.6727134168. The cubic root of 2102742720 is about 1281.1364256416.

The spelling of 2102742720 in words is "two billion, one hundred two million, seven hundred forty-two thousand, seven hundred twenty".