20042243023 has 16 divisors (see below), whose sum is σ = 22187865600. Its totient is φ = 17950917600.

The previous prime is 20042243003. The next prime is 20042243027. The reversal of 20042243023 is 32034224002.

It is not a de Polignac number, because 20042243023 - 2¹³ = 20042234831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20042242985 and 20042243003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20042243027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201486 + ... + 1218052.

It is an arithmetic number, because the mean of its divisors is an integer number (1386741600).

Almost surely, 2^20042243023 is an apocalyptic number.

20042243023 is a deficient number, since it is larger than the sum of its proper divisors (2145622577).

20042243023 is a wasteful number, since it uses less digits than its factorization.

20042243023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18198.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20042243023 its reverse (32034224002), we get a palindrome (52076467025).

The spelling of 20042243023 in words is "twenty billion, forty-two million, two hundred forty-three thousand, twenty-three".