2109733857 has 180 divisors, whose sum is σ = 4226923008. Its totient is φ = 1042826400.

The previous prime is 2109733853. The next prime is 2109733867. The reversal of 2109733857 is 7583379012.

It is a happy number.

It is not a de Polignac number, because 2109733857 - 2² = 2109733853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2109733853) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 11045632 + ... + 11045822.

Almost surely, 2^2109733857 is an apocalyptic number.

2109733857 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2109733857 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

2109733857 is a wasteful number, since it uses less digits than its factorization.

2109733857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 2109733857 is about 45931.8392512209. The cubic root of 2109733857 is about 1282.5546832127.

The spelling of 2109733857 in words is "two billion, one hundred nine million, seven hundred thirty-three thousand, eight hundred fifty-seven".