2100239923 has 2 divisors, whose sum is σ = 2100239924. Its totient is φ = 2100239922.

The previous prime is 2100239909. The next prime is 2100240007. The reversal of 2100239923 is 3299320012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100239923 is a prime.

It is a super-2 number, since 2×2100239923² = 8822015468326091858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2100239903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050119961 + 1050119962.

It is an arithmetic number, because the mean of its divisors is an integer number (1050119962).

Almost surely, 2^2100239923 is an apocalyptic number.

2100239923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100239923 is an equidigital number, since it uses as much as digits as its factorization.

2100239923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 2100239923 is about 45828.3746493371. The cubic root of 2100239923 is about 1280.6279314470.

Adding to 2100239923 its reverse (3299320012), we get a palindrome (5399559935).

The spelling of 2100239923 in words is "two billion, one hundred million, two hundred thirty-nine thousand, nine hundred twenty-three".