20450020565423 has 4 divisors (see below), whose sum is σ = 20450239799760. Its totient is φ = 20449801331088.

The previous prime is 20450020565407. The next prime is 20450020565437. The reversal of 20450020565423 is 32456502005402.

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 20450020565423 - 2⁴ = 20450020565407 is a prime.

It is a super-2 number, since 2×20450020565423² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450020565123) 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, 109477190 + ... + 109663827.

It is an arithmetic number, because the mean of its divisors is an integer number (5112559949940).

Almost surely, 2^{20450020565423} is an apocalyptic number.

20450020565423 is a deficient number, since it is larger than the sum of its proper divisors (219234337).

20450020565423 is an equidigital number, since it uses as much as digits as its factorization.

20450020565423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219234336.

The product of its (nonzero) digits is 288000, while the sum is 38.

The spelling of 20450020565423 in words is "twenty trillion, four hundred fifty billion, twenty million, five hundred sixty-five thousand, four hundred twenty-three".