20323121003 has 16 divisors (see below), whose sum is σ = 20904998400. Its totient is φ = 19746515040.

The previous prime is 20323120997. The next prime is 20323121009. The reversal of 20323121003 is 30012132302.

It is an interprime number because it is at equal distance from previous prime (20323120997) and next prime (20323121009).

It is not a de Polignac number, because 20323121003 - 2¹⁸ = 20322858859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323121009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7207928 + ... + 7210746.

It is an arithmetic number, because the mean of its divisors is an integer number (1306562400).

Almost surely, 2^20323121003 is an apocalyptic number.

20323121003 is a deficient number, since it is larger than the sum of its proper divisors (581877397).

20323121003 is a wasteful number, since it uses less digits than its factorization.

20323121003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20323121003 its reverse (30012132302), we get a palindrome (50335253305).

The spelling of 20323121003 in words is "twenty billion, three hundred twenty-three million, one hundred twenty-one thousand, three".