20452423323553 has 4 divisors (see below), whose sum is σ = 22025686656148. Its totient is φ = 18879159990960.

The previous prime is 20452423323533. The next prime is 20452423323557. The reversal of 20452423323553 is 35532332425402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1344273287184 + 19108150036369 = 1159428^2 + 4371287^2 .

It is a cyclic number.

It is not a de Polignac number, because 20452423323553 - 2³³ = 20443833388961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20452423323557) 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, 786631666278 + ... + 786631666303.

It is an arithmetic number, because the mean of its divisors is an integer number (5506421664037).

Almost surely, 2^{20452423323553} is an apocalyptic number.

It is an amenable number.

20452423323553 is a deficient number, since it is larger than the sum of its proper divisors (1573263332595).

20452423323553 is a wasteful number, since it uses less digits than its factorization.

20452423323553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573263332594.

The product of its (nonzero) digits is 2592000, while the sum is 43.

Adding to 20452423323553 its reverse (35532332425402), we get a palindrome (55984755748955).

The spelling of 20452423323553 in words is "twenty trillion, four hundred fifty-two billion, four hundred twenty-three million, three hundred twenty-three thousand, five hundred fifty-three".