2100745380 has 48 divisors (see below), whose sum is σ = 6071837184. Its totient is φ = 542127360.

The previous prime is 2100745343. The next prime is 2100745429. The reversal of 2100745380 is 835470012.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 562857 + ... + 566576.

It is an arithmetic number, because the mean of its divisors is an integer number (126496608).

Almost surely, 2^2100745380 is an apocalyptic number.

2100745380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100745380 is an abundant number, since it is smaller than the sum of its proper divisors (3971091804).

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

2100745380 is a wasteful number, since it uses less digits than its factorization.

2100745380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129476 (or 1129474 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2100745380 is about 45833.8889905712. Note that the first 3 decimals coincide. The cubic root of 2100745380 is about 1280.7306578743.

The spelling of 2100745380 in words is "two billion, one hundred million, seven hundred forty-five thousand, three hundred eighty".