20001323211 has 32 divisors (see below), whose sum is σ = 27627310848. Its totient is φ = 12861555840.

The previous prime is 20001323179. The next prime is 20001323231. The reversal of 20001323211 is 11232310002.

It is not a de Polignac number, because 20001323211 - 2⁵ = 20001323179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001323231) 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, 6486076 + ... + 6489158.

It is an arithmetic number, because the mean of its divisors is an integer number (863353464).

Almost surely, 2^20001323211 is an apocalyptic number.

20001323211 is a deficient number, since it is larger than the sum of its proper divisors (7625987637).

20001323211 is a wasteful number, since it uses less digits than its factorization.

20001323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20001323211 its reverse (11232310002), we get a palindrome (31233633213).

The spelling of 20001323211 in words is "twenty billion, one million, three hundred twenty-three thousand, two hundred eleven".