Search a number
-
+
21203321323 = 173122562551
BaseRepresentation
bin10011101111110100…
…010000000111101011
32000201200210022210011
4103233310100013223
5321411022240243
613423552432351
71350303154222
oct235764200753
960650708704
1021203321323
118aa07a4158
124138b486b7
131ccba92aa2
14105203bcb9
1584171089d
hex4efd101eb

21203321323 has 4 divisors (see below), whose sum is σ = 21325884048. Its totient is φ = 21080758600.

The previous prime is 21203321309. The next prime is 21203321327. The reversal of 21203321323 is 32312330212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-21203321323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21203321294 and 21203321303.

It is not an unprimeable number, because it can be changed into a prime (21203321327) 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 3 ways as a sum of consecutive naturals, for example, 61281103 + ... + 61281448.

It is an arithmetic number, because the mean of its divisors is an integer number (5331471012).

Almost surely, 221203321323 is an apocalyptic number.

21203321323 is a deficient number, since it is larger than the sum of its proper divisors (122562725).

21203321323 is a wasteful number, since it uses less digits than its factorization.

21203321323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122562724.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21203321323 its reverse (32312330212), we get a palindrome (53515651535).

The spelling of 21203321323 in words is "twenty-one billion, two hundred three million, three hundred twenty-one thousand, three hundred twenty-three".

Divisors: 1 173 122562551 21203321323