20900616329 has 4 divisors (see below), whose sum is σ = 20928226884. Its totient is φ = 20873005776.

The previous prime is 20900616313. The next prime is 20900616337. The reversal of 20900616329 is 92361600902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10845139600 + 10055476729 = 104140^2 + 100277^2 .

It is a cyclic number.

It is not a de Polignac number, because 20900616329 - 2⁴ = 20900616313 is a prime.

It is a super-2 number, since 2×20900616329² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20900616292 and 20900616301.

It is not an unprimeable number, because it can be changed into a prime (20900616389) 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, 13804142 + ... + 13805655.

It is an arithmetic number, because the mean of its divisors is an integer number (5232056721).

Almost surely, 2^20900616329 is an apocalyptic number.

It is an amenable number.

20900616329 is a deficient number, since it is larger than the sum of its proper divisors (27610555).

20900616329 is an equidigital number, since it uses as much as digits as its factorization.

20900616329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27610554.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 20900616329 in words is "twenty billion, nine hundred million, six hundred sixteen thousand, three hundred twenty-nine".