20540550523 has 4 divisors (see below), whose sum is σ = 20553099840. Its totient is φ = 20528001208.

The previous prime is 20540550451. The next prime is 20540550529. The reversal of 20540550523 is 32505504502.

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 20540550523 - 2¹³ = 20540542331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20540550529) 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, 6272203 + ... + 6275476.

It is an arithmetic number, because the mean of its divisors is an integer number (5138274960).

Almost surely, 2^20540550523 is an apocalyptic number.

20540550523 is a deficient number, since it is larger than the sum of its proper divisors (12549317).

20540550523 is a wasteful number, since it uses less digits than its factorization.

20540550523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12549316.

The product of its (nonzero) digits is 30000, while the sum is 31.

The spelling of 20540550523 in words is "twenty billion, five hundred forty million, five hundred fifty thousand, five hundred twenty-three".