20858340321 has 64 divisors (see below), whose sum is σ = 38409315840. Its totient is φ = 10893139200.

The previous prime is 20858340313. The next prime is 20858340329. The reversal of 20858340321 is 12304385802.

20858340321 is a `hidden beast` number, since 2 + 0 + 8 + 583 + 40 + 32 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20858340313) and next prime (20858340329).

It is not a de Polignac number, because 20858340321 - 2³ = 20858340313 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20858340329) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 206131 + ... + 290183.

It is an arithmetic number, because the mean of its divisors is an integer number (600145560).

Almost surely, 2^20858340321 is an apocalyptic number.

20858340321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20858340321 is a deficient number, since it is larger than the sum of its proper divisors (17550975519).

20858340321 is a wasteful number, since it uses less digits than its factorization.

20858340321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84183 (or 84177 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 20858340321 in words is "twenty billion, eight hundred fifty-eight million, three hundred forty thousand, three hundred twenty-one".