2104921688 has 24 divisors (see below), whose sum is σ = 4165389180. Its totient is φ = 997066800.

The previous prime is 2104921667. The next prime is 2104921711. The reversal of 2104921688 is 8861294012.

It is a super-2 number, since 2×2104921688² = 8861390625225538688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361538 + ... + 367313.

Almost surely, 2^2104921688 is an apocalyptic number.

It is an amenable number.

2104921688 is a deficient number, since it is larger than the sum of its proper divisors (2060467492).

2104921688 is a wasteful number, since it uses less digits than its factorization.

2104921688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728895 (or 728872 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 2104921688 is about 45879.4255413034. The cubic root of 2104921688 is about 1281.5787989212.

The spelling of 2104921688 in words is "two billion, one hundred four million, nine hundred twenty-one thousand, six hundred eighty-eight".