20573345203427 has 4 divisors (see below), whose sum is σ = 20587563135216. Its totient is φ = 20559127271640.

The previous prime is 20573345203421. The next prime is 20573345203447. The reversal of 20573345203427 is 72430254337502.

It is a happy number.

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 20573345203427 - 2²⁰ = 20573344154851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20573345203421) 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, 7108963724 + ... + 7108966617.

It is an arithmetic number, because the mean of its divisors is an integer number (5146890783804).

Almost surely, 2^{20573345203427} is an apocalyptic number.

20573345203427 is a deficient number, since it is larger than the sum of its proper divisors (14217931789).

20573345203427 is a wasteful number, since it uses less digits than its factorization.

20573345203427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14217931788.

The product of its (nonzero) digits is 4233600, while the sum is 47.

The spelling of 20573345203427 in words is "twenty trillion, five hundred seventy-three billion, three hundred forty-five million, two hundred three thousand, four hundred twenty-seven".