2126023605 has 20 divisors (see below), whose sum is σ = 3811094892. Its totient is φ = 1133879040.

The previous prime is 2126023597. The next prime is 2126023631. The reversal of 2126023605 is 5063206212.

2126023605 is a `hidden beast` number, since 21 + 2 + 602 + 36 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 809857764 + 1316165841 = 28458^2 + 36279^2 .

It is not a de Polignac number, because 2126023605 - 2³ = 2126023597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 19 ways as a sum of consecutive naturals, for example, 2624316 + ... + 2625125.

Almost surely, 2^2126023605 is an apocalyptic number.

It is an amenable number.

2126023605 is a deficient number, since it is larger than the sum of its proper divisors (1685071287).

2126023605 is an equidigital number, since it uses as much as digits as its factorization.

2126023605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249458 (or 5249449 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2126023605 is about 46108.8235048347. The cubic root of 2126023605 is about 1285.8471917370.

Adding to 2126023605 its reverse (5063206212), we get a palindrome (7189229817).

The spelling of 2126023605 in words is "two billion, one hundred twenty-six million, twenty-three thousand, six hundred five".