20522231012013 has 4 divisors (see below), whose sum is σ = 27362974682688. Its totient is φ = 13681487341340.

The previous prime is 20522231011957. The next prime is 20522231012033. The reversal of 20522231012013 is 31021013222502.

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 20522231012013 - 2²¹ = 20522228914861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20522231012033) 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, 3420371835333 + ... + 3420371835338.

It is an arithmetic number, because the mean of its divisors is an integer number (6840743670672).

Almost surely, 2^{20522231012013} is an apocalyptic number.

It is an amenable number.

20522231012013 is a deficient number, since it is larger than the sum of its proper divisors (6840743670675).

20522231012013 is an equidigital number, since it uses as much as digits as its factorization.

20522231012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840743670674.

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 20522231012013 its reverse (31021013222502), we get a palindrome (51543244234515).

The spelling of 20522231012013 in words is "twenty trillion, five hundred twenty-two billion, two hundred thirty-one million, twelve thousand, thirteen".