20001323003 has 4 divisors (see below), whose sum is σ = 20299850280. Its totient is φ = 19702795728.

The previous prime is 20001322981. The next prime is 20001323053. The reversal of 20001323003 is 30032310002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001323003 - 2²⁴ = 19984545787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001323053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149263538 + ... + 149263671.

It is an arithmetic number, because the mean of its divisors is an integer number (5074962570).

Almost surely, 2^20001323003 is an apocalyptic number.

20001323003 is a deficient number, since it is larger than the sum of its proper divisors (298527277).

20001323003 is an equidigital number, since it uses as much as digits as its factorization.

20001323003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298527276.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 20001323003 its reverse (30032310002), we get a palindrome (50033633005).

The spelling of 20001323003 in words is "twenty billion, one million, three hundred twenty-three thousand, three".