20232120042 has 24 divisors (see below), whose sum is σ = 44663361444. Its totient is φ = 6616793664.

The previous prime is 20232119983. The next prime is 20232120059. The reversal of 20232120042 is 24002123202.

It can be written as a sum of positive squares in 2 ways, for example, as 20192694201 + 39425841 = 142101^2 + 6279^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20232119997 and 20232120024.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10602883 + ... + 10604790.

Almost surely, 2^20232120042 is an apocalyptic number.

20232120042 is an abundant number, since it is smaller than the sum of its proper divisors (24431241402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20232120042 is a wasteful number, since it uses less digits than its factorization.

20232120042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21207734 (or 21207731 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20232120042 its reverse (24002123202), we get a palindrome (44234243244).

The spelling of 20232120042 in words is "twenty billion, two hundred thirty-two million, one hundred twenty thousand, forty-two".