2123605444 has 12 divisors (see below), whose sum is σ = 3777233068. Its totient is φ = 1044396000.

The previous prime is 2123605427. The next prime is 2123605457. The reversal of 2123605444 is 4445063212.

It can be written as a sum of positive squares in 2 ways, for example, as 1128960000 + 994645444 = 33600^2 + 31538^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 4351407 + ... + 4351894.

Almost surely, 2^2123605444 is an apocalyptic number.

It is an amenable number.

2123605444 is a deficient number, since it is larger than the sum of its proper divisors (1653627624).

2123605444 is a wasteful number, since it uses less digits than its factorization.

2123605444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8703366 (or 8703364 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 2123605444 is about 46082.5937204060. The cubic root of 2123605444 is about 1285.3594948693.

Adding to 2123605444 its reverse (4445063212), we get a palindrome (6568668656).

The spelling of 2123605444 in words is "two billion, one hundred twenty-three million, six hundred five thousand, four hundred forty-four".