20043123242 has 4 divisors (see below), whose sum is σ = 30064684866. Its totient is φ = 10021561620.

The previous prime is 20043123241. The next prime is 20043123277. The reversal of 20043123242 is 24232134002.

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., 13243636561 + 6799486681 = 115081^2 + 82459^2 .

It is not an unprimeable number, because it can be changed into a prime (20043123241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010780809 + ... + 5010780812.

Almost surely, 2^20043123242 is an apocalyptic number.

20043123242 is a deficient number, since it is larger than the sum of its proper divisors (10021561624).

20043123242 is a wasteful number, since it uses less digits than its factorization.

20043123242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10021561623.

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

Adding to 20043123242 its reverse (24232134002), we get a palindrome (44275257244).

The spelling of 20043123242 in words is "twenty billion, forty-three million, one hundred twenty-three thousand, two hundred forty-two".