20100321003 has 16 divisors (see below), whose sum is σ = 31456874240. Its totient is φ = 11175467616.

The previous prime is 20100321001. The next prime is 20100321037. The reversal of 20100321003 is 30012300102.

It is a happy number.

It is not a de Polignac number, because 20100321003 - 2¹ = 20100321001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20100321003.

It is not an unprimeable number, because it can be changed into a prime (20100321001) 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, 12933793 + ... + 12935346.

It is an arithmetic number, because the mean of its divisors is an integer number (1966054640).

Almost surely, 2^20100321003 is an apocalyptic number.

20100321003 is a deficient number, since it is larger than the sum of its proper divisors (11356553237).

20100321003 is a wasteful number, since it uses less digits than its factorization.

20100321003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25869186.

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 20100321003 its reverse (30012300102), we get a palindrome (50112621105).

The spelling of 20100321003 in words is "twenty billion, one hundred million, three hundred twenty-one thousand, three".