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20321111413 = 31655519723
BaseRepresentation
bin10010111011001110…
…111000110101110101
31221110012202102022001
4102323032320311311
5313104201031123
613200235535301
71316401411531
oct227316706565
957405672261
1020321111413
118688812859
123b315ba531
131bbb0879a5
14daabd2bc1
157de04a0ad
hex4bb3b8d75

20321111413 has 4 divisors (see below), whose sum is σ = 20976631168. Its totient is φ = 19665591660.

The previous prime is 20321111407. The next prime is 20321111417. The reversal of 20321111413 is 31411112302.

Adding to 20321111413 its reverse (31411112302), we get a palindrome (51732223715).

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: 31411112302 = 215705556151.

It is a cyclic number.

It is not a de Polignac number, because 20321111413 - 225 = 20287556981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321111417) 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, 327759831 + ... + 327759892.

It is an arithmetic number, because the mean of its divisors is an integer number (5244157792).

Almost surely, 220321111413 is an apocalyptic number.

It is an amenable number.

20321111413 is a deficient number, since it is larger than the sum of its proper divisors (655519755).

20321111413 is an equidigital number, since it uses as much as digits as its factorization.

20321111413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655519754.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 20321111413 in words is "twenty billion, three hundred twenty-one million, one hundred eleven thousand, four hundred thirteen".

Divisors: 1 31 655519723 20321111413