20321403105 has 32 divisors (see below), whose sum is σ = 32996133504. Its totient is φ = 10677782016.

The previous prime is 20321403103. The next prime is 20321403121. The reversal of 20321403105 is 50130412302.

It is not a de Polignac number, because 20321403105 - 2¹ = 20321403103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321403103) 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, 1027167 + ... + 1046763.

It is an arithmetic number, because the mean of its divisors is an integer number (1031129172).

Almost surely, 2^20321403105 is an apocalyptic number.

It is an amenable number.

20321403105 is a deficient number, since it is larger than the sum of its proper divisors (12674730399).

20321403105 is a wasteful number, since it uses less digits than its factorization.

20321403105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20625.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20321403105 its reverse (50130412302), we get a palindrome (70451815407).

The spelling of 20321403105 in words is "twenty billion, three hundred twenty-one million, four hundred three thousand, one hundred five".