20568423073 has 4 divisors (see below), whose sum is σ = 22438279728. Its totient is φ = 18698566420.

The previous prime is 20568423023. The next prime is 20568423163. The reversal of 20568423073 is 37032486502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20568423073 - 2²¹ = 20566325921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20568423013) 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, 934928311 + ... + 934928332.

It is an arithmetic number, because the mean of its divisors is an integer number (5609569932).

Almost surely, 2^20568423073 is an apocalyptic number.

It is an amenable number.

20568423073 is a deficient number, since it is larger than the sum of its proper divisors (1869856655).

20568423073 is a wasteful number, since it uses less digits than its factorization.

20568423073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869856654.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20568423073 in words is "twenty billion, five hundred sixty-eight million, four hundred twenty-three thousand, seventy-three".