20404233023 has 4 divisors (see below), whose sum is σ = 20406528648. Its totient is φ = 20401937400.

The previous prime is 20404233013. The next prime is 20404233067. The reversal of 20404233023 is 32033240402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20404233023 - 2¹⁴ = 20404216639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20404233023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404233013) 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 in 3 ways as a sum of consecutive naturals, for example, 1134428 + ... + 1152273.

It is an arithmetic number, because the mean of its divisors is an integer number (5101632162).

Almost surely, 2^20404233023 is an apocalyptic number.

20404233023 is a deficient number, since it is larger than the sum of its proper divisors (2295625).

20404233023 is an equidigital number, since it uses as much as digits as its factorization.

20404233023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2295624.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20404233023 its reverse (32033240402), we get a palindrome (52437473425).

The spelling of 20404233023 in words is "twenty billion, four hundred four million, two hundred thirty-three thousand, twenty-three".