2100776904 has 64 divisors (see below), whose sum is σ = 6178766400. Its totient is φ = 659066112.

The previous prime is 2100776851. The next prime is 2100776929. The reversal of 2100776904 is 4096770012.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282382 + ... + 289725.

It is an arithmetic number, because the mean of its divisors is an integer number (96543225).

Almost surely, 2^2100776904 is an apocalyptic number.

2100776904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2100776904 is an abundant number, since it is smaller than the sum of its proper divisors (4077989496).

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

2100776904 is a wasteful number, since it uses less digits than its factorization.

2100776904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572139 (or 572129 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2100776904 is about 45834.2328832937. The cubic root of 2100776904 is about 1280.7370641007.

The spelling of 2100776904 in words is "two billion, one hundred million, seven hundred seventy-six thousand, nine hundred four".