2097817668 has 18 divisors (see below), whose sum is σ = 5302816974. Its totient is φ = 699272544.

The previous prime is 2097817643. The next prime is 2097817679. The reversal of 2097817668 is 8667187902.

It can be written as a sum of positive squares in only one way, i.e., 1762488324 + 335329344 = 41982^2 + 18312^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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, 29136321 + ... + 29136392.

It is an arithmetic number, because the mean of its divisors is an integer number (294600943).

Almost surely, 2^2097817668 is an apocalyptic number.

It is an amenable number.

2097817668 is an abundant number, since it is smaller than the sum of its proper divisors (3204999306).

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

2097817668 is a wasteful number, since it uses less digits than its factorization.

2097817668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58272723 (or 58272718 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 2097817668 is about 45801.9395659179. The cubic root of 2097817668 is about 1280.1354161746.

The spelling of 2097817668 in words is "two billion, ninety-seven million, eight hundred seventeen thousand, six hundred sixty-eight".