20523522313 has 16 divisors (see below), whose sum is σ = 23506048384. Its totient is φ = 17553697920.

The previous prime is 20523522301. The next prime is 20523522319. The reversal of 20523522313 is 31322532502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20523522313 - 2²¹ = 20521425161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20523522319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10327906 + ... + 10329892.

It is an arithmetic number, because the mean of its divisors is an integer number (1469128024).

Almost surely, 2^20523522313 is an apocalyptic number.

It is an amenable number.

20523522313 is a deficient number, since it is larger than the sum of its proper divisors (2982526071).

20523522313 is a wasteful number, since it uses less digits than its factorization.

20523522313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432.

The product of its (nonzero) digits is 10800, while the sum is 28.

The spelling of 20523522313 in words is "twenty billion, five hundred twenty-three million, five hundred twenty-two thousand, three hundred thirteen".