20829567313 has 4 divisors (see below), whose sum is σ = 20831700208. Its totient is φ = 20827434420.

The previous prime is 20829567293. The next prime is 20829567331. The reversal of 20829567313 is 31376592802.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31376592802 = 2 ⋅15688296401.

It is a cyclic number.

It is not a de Polignac number, because 20829567313 - 2⁵ = 20829567281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20829567383) 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, 1051731 + ... + 1071352.

It is an arithmetic number, because the mean of its divisors is an integer number (5207925052).

Almost surely, 2^20829567313 is an apocalyptic number.

It is an amenable number.

20829567313 is a deficient number, since it is larger than the sum of its proper divisors (2132895).

20829567313 is an equidigital number, since it uses as much as digits as its factorization.

20829567313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132894.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 20829567313 in words is "twenty billion, eight hundred twenty-nine million, five hundred sixty-seven thousand, three hundred thirteen".