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20331303221 = 173138579323
BaseRepresentation
bin10010111011110101…
…110001000100110101
31221110220221012211102
4102323311301010311
5313114303200341
613201242215445
71316554140335
oct227365610465
957426835742
1020331303221
118693544039
123b34ab4585
131bc0215948
14dac2c70c5
157dedaec9b
hex4bbd71135

20331303221 has 8 divisors (see below), whose sum is σ = 22221690624. Its totient is φ = 18518074560.

The previous prime is 20331303079. The next prime is 20331303281. The reversal of 20331303221 is 12230313302.

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 20331303221 - 218 = 20331041077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20331303193 and 20331303202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331303281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19289135 + ... + 19290188.

It is an arithmetic number, because the mean of its divisors is an integer number (2777711328).

Almost surely, 220331303221 is an apocalyptic number.

It is an amenable number.

20331303221 is a deficient number, since it is larger than the sum of its proper divisors (1890387403).

20331303221 is a wasteful number, since it uses less digits than its factorization.

20331303221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38579371.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20331303221 its reverse (12230313302), we get a palindrome (32561616523).

The spelling of 20331303221 in words is "twenty billion, three hundred thirty-one million, three hundred three thousand, two hundred twenty-one".

Divisors: 1 17 31 527 38579323 655848491 1195959013 20331303221