20321743317 has 16 divisors (see below), whose sum is σ = 27991541760. Its totient is φ = 13100569200.

The previous prime is 20321743291. The next prime is 20321743319. The reversal of 20321743317 is 71334712302.

It is not a de Polignac number, because 20321743317 - 2⁸ = 20321743061 is a prime.

It is a super-3 number, since 3×20321743317³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321743319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35434 + ... + 204692.

It is an arithmetic number, because the mean of its divisors is an integer number (1749471360).

Almost surely, 2^20321743317 is an apocalyptic number.

It is an amenable number.

20321743317 is a deficient number, since it is larger than the sum of its proper divisors (7669798443).

20321743317 is a wasteful number, since it uses less digits than its factorization.

20321743317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170584.

The product of its (nonzero) digits is 21168, while the sum is 33.

The spelling of 20321743317 in words is "twenty billion, three hundred twenty-one million, seven hundred forty-three thousand, three hundred seventeen".