20321020103223 has 32 divisors (see below), whose sum is σ = 32931291585024. Its totient is φ = 10880806781952.

The previous prime is 20321020103221. The next prime is 20321020103231. The reversal of 20321020103223 is 32230102012302.

It is a happy number.

It is not a de Polignac number, because 20321020103223 - 2¹ = 20321020103221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20321020103223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321020103221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125296990 + ... + 125459067.

It is an arithmetic number, because the mean of its divisors is an integer number (1029102862032).

Almost surely, 2^{20321020103223} is an apocalyptic number.

20321020103223 is a deficient number, since it is larger than the sum of its proper divisors (12610271481801).

20321020103223 is a wasteful number, since it uses less digits than its factorization.

20321020103223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250756311.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20321020103223 its reverse (32230102012302), we get a palindrome (52551122115525).

The spelling of 20321020103223 in words is "twenty trillion, three hundred twenty-one billion, twenty million, one hundred three thousand, two hundred twenty-three".