2123906864 has 10 divisors (see below), whose sum is σ = 4115069580. Its totient is φ = 1061953424.

The previous prime is 2123906831. The next prime is 2123906867. The reversal of 2123906864 is 4686093212.

It is not an unprimeable number, because it can be changed into a prime (2123906867) by changing a digit.

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 as a sum of consecutive naturals, namely, 66372074 + ... + 66372105.

It is an arithmetic number, because the mean of its divisors is an integer number (411506958).

Almost surely, 2^2123906864 is an apocalyptic number.

It is an amenable number.

2123906864 is a deficient number, since it is larger than the sum of its proper divisors (1991162716).

2123906864 is a wasteful number, since it uses less digits than its factorization.

2123906864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132744187 (or 132744181 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 2123906864 is about 46085.8640366002. The cubic root of 2123906864 is about 1285.4203057151.

The spelling of 2123906864 in words is "two billion, one hundred twenty-three million, nine hundred six thousand, eight hundred sixty-four".