20423445404245 has 16 divisors (see below), whose sum is σ = 26640042670080. Its totient is φ = 14940976302144.

The previous prime is 20423445404231. The next prime is 20423445404267. The reversal of 20423445404245 is 54240454432402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20423445404245 - 2¹⁵ = 20423445371477 is a prime.

It is a super-2 number, since 2×20423445404245² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1468249365 + ... + 1468263274.

It is an arithmetic number, because the mean of its divisors is an integer number (1665002666880).

Almost surely, 2^{20423445404245} is an apocalyptic number.

It is an amenable number.

20423445404245 is a deficient number, since it is larger than the sum of its proper divisors (6216597265835).

20423445404245 is a wasteful number, since it uses less digits than its factorization.

20423445404245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936512764.

The product of its (nonzero) digits is 2457600, while the sum is 43.

Adding to 20423445404245 its reverse (54240454432402), we get a palindrome (74663899836647).

The spelling of 20423445404245 in words is "twenty trillion, four hundred twenty-three billion, four hundred forty-five million, four hundred four thousand, two hundred forty-five".