20545944233 has 4 divisors (see below), whose sum is σ = 20560384128. Its totient is φ = 20531504340.

The previous prime is 20545944227. The next prime is 20545944257. The reversal of 20545944233 is 33244954502.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33244954502 = 2 ⋅16622477251.

It is a cyclic number.

It is not a de Polignac number, because 20545944233 - 2¹⁶ = 20545878697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20545944283) 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, 7217813 + ... + 7220658.

It is an arithmetic number, because the mean of its divisors is an integer number (5140096032).

Almost surely, 2^20545944233 is an apocalyptic number.

It is an amenable number.

20545944233 is a deficient number, since it is larger than the sum of its proper divisors (14439895).

20545944233 is a wasteful number, since it uses less digits than its factorization.

20545944233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14439894.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 20545944233 in words is "twenty billion, five hundred forty-five million, nine hundred forty-four thousand, two hundred thirty-three".