20523143413 has 8 divisors (see below), whose sum is σ = 21145325400. Its totient is φ = 19909663488.

The previous prime is 20523143383. The next prime is 20523143437. The reversal of 20523143413 is 31434132502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6528963204 + 13994180209 = 80802^2 + 118297^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20523143413 - 2²⁵ = 20489588981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523143213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2170728 + ... + 2180161.

It is an arithmetic number, because the mean of its divisors is an integer number (2643165675).

Almost surely, 2^20523143413 is an apocalyptic number.

It is an amenable number.

20523143413 is a deficient number, since it is larger than the sum of its proper divisors (622181987).

20523143413 is an equidigital number, since it uses as much as digits as its factorization.

20523143413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351031.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 20523143413 its reverse (31434132502), we get a palindrome (51957275915).

The spelling of 20523143413 in words is "twenty billion, five hundred twenty-three million, one hundred forty-three thousand, four hundred thirteen".