20231023042 has 4 divisors (see below), whose sum is σ = 30346534566. Its totient is φ = 10115511520.

The previous prime is 20231023039. The next prime is 20231023049. The reversal of 20231023042 is 24032013202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24032013202 = 2 ⋅12016006601.

It can be written as a sum of positive squares in only one way, i.e., 10955599561 + 9275423481 = 104669^2 + 96309^2 .

It is not an unprimeable number, because it can be changed into a prime (20231023049) 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, 5057755759 + ... + 5057755762.

Almost surely, 2^20231023042 is an apocalyptic number.

20231023042 is a deficient number, since it is larger than the sum of its proper divisors (10115511524).

20231023042 is a wasteful number, since it uses less digits than its factorization.

20231023042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10115511523.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20231023042 its reverse (24032013202), we get a palindrome (44263036244).

The spelling of 20231023042 in words is "twenty billion, two hundred thirty-one million, twenty-three thousand, forty-two".