20523242013 has 4 divisors (see below), whose sum is σ = 27364322688. Its totient is φ = 13682161340.

The previous prime is 20523241933. The next prime is 20523242023. The reversal of 20523242013 is 31024232502.

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 20523242013 - 2³² = 16228274717 is a prime.

It is a super-3 number, since 3×20523242013³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523242023) 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, 3420540333 + ... + 3420540338.

It is an arithmetic number, because the mean of its divisors is an integer number (6841080672).

Almost surely, 2^20523242013 is an apocalyptic number.

It is an amenable number.

20523242013 is a deficient number, since it is larger than the sum of its proper divisors (6841080675).

20523242013 is an equidigital number, since it uses as much as digits as its factorization.

20523242013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6841080674.

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 20523242013 its reverse (31024232502), we get a palindrome (51547474515).

The spelling of 20523242013 in words is "twenty billion, five hundred twenty-three million, two hundred forty-two thousand, thirteen".