20042242043 has 4 divisors (see below), whose sum is σ = 20042528568. Its totient is φ = 20041955520.

The previous prime is 20042242037. The next prime is 20042242061. The reversal of 20042242043 is 34024224002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20042242043 - 2⁴ = 20042242027 is a prime.

It is a super-2 number, since 2×20042242043² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20042242013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38708 + ... + 203918.

It is an arithmetic number, because the mean of its divisors is an integer number (5010632142).

Almost surely, 2^20042242043 is an apocalyptic number.

20042242043 is a deficient number, since it is larger than the sum of its proper divisors (286525).

20042242043 is a wasteful number, since it uses less digits than its factorization.

20042242043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286524.

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20042242043 its reverse (34024224002), we get a palindrome (54066466045).

The spelling of 20042242043 in words is "twenty billion, forty-two million, two hundred forty-two thousand, forty-three".