2123023442 has 4 divisors (see below), whose sum is σ = 3184535166. Its totient is φ = 1061511720.

The previous prime is 2123023433. The next prime is 2123023447. The reversal of 2123023442 is 2443203212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1850806441 + 272217001 = 43021^2 + 16499^2 .

It is not an unprimeable number, because it can be changed into a prime (2123023447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530755859 + ... + 530755862.

Almost surely, 2^2123023442 is an apocalyptic number.

2123023442 is a deficient number, since it is larger than the sum of its proper divisors (1061511724).

2123023442 is a wasteful number, since it uses less digits than its factorization.

2123023442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061511723.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 2123023442 is about 46076.2785172587. The cubic root of 2123023442 is about 1285.2420609160.

Adding to 2123023442 its reverse (2443203212), we get a palindrome (4566226654).

The spelling of 2123023442 in words is "two billion, one hundred twenty-three million, twenty-three thousand, four hundred forty-two".