20312321103 has 32 divisors (see below), whose sum is σ = 30726259200. Its totient is φ = 13259239488.

The previous prime is 20312321101. The next prime is 20312321167. The reversal of 20312321103 is 30112321302.

20312321103 is a `hidden beast` number, since 20 + 312 + 321 + 10 + 3 = 666.

It is not a de Polignac number, because 20312321103 - 2¹ = 20312321101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312321101) 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, 206476 + ... + 288542.

It is an arithmetic number, because the mean of its divisors is an integer number (960195600).

Almost surely, 2^20312321103 is an apocalyptic number.

20312321103 is a deficient number, since it is larger than the sum of its proper divisors (10413938097).

20312321103 is a wasteful number, since it uses less digits than its factorization.

20312321103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82268 (or 82262 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20312321103 its reverse (30112321302), we get a palindrome (50424642405).

The spelling of 20312321103 in words is "twenty billion, three hundred twelve million, three hundred twenty-one thousand, one hundred three".