2123731756 has 12 divisors (see below), whose sum is σ = 3836418880. Its totient is φ = 1027612080.

The previous prime is 2123731739. The next prime is 2123731759. The reversal of 2123731756 is 6571373212.

It is not an unprimeable number, because it can be changed into a prime (2123731759) 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 in 3 ways as a sum of consecutive naturals, for example, 8563311 + ... + 8563558.

Almost surely, 2^2123731756 is an apocalyptic number.

It is an amenable number.

2123731756 is a deficient number, since it is larger than the sum of its proper divisors (1712687124).

2123731756 is a wasteful number, since it uses less digits than its factorization.

2123731756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126904 (or 17126902 counting only the distinct ones).

The product of its digits is 52920, while the sum is 37.

The square root of 2123731756 is about 46083.9641958024. The cubic root of 2123731756 is about 1285.3849787478.

The spelling of 2123731756 in words is "two billion, one hundred twenty-three million, seven hundred thirty-one thousand, seven hundred fifty-six".