20042232123 has 16 divisors (see below), whose sum is σ = 26838295200. Its totient is φ = 13303873536.

The previous prime is 20042232121. The next prime is 20042232173. The reversal of 20042232123 is 32123224002.

It is not a de Polignac number, because 20042232123 - 2¹ = 20042232121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20042232123.

It is not an unprimeable number, because it can be changed into a prime (20042232121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2655411 + ... + 2662947.

It is an arithmetic number, because the mean of its divisors is an integer number (1677393450).

Almost surely, 2^20042232123 is an apocalyptic number.

20042232123 is a deficient number, since it is larger than the sum of its proper divisors (6796063077).

20042232123 is a wasteful number, since it uses less digits than its factorization.

20042232123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11246.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20042232123 its reverse (32123224002), we get a palindrome (52165456125).

The spelling of 20042232123 in words is "twenty billion, forty-two million, two hundred thirty-two thousand, one hundred twenty-three".