20013232211 has 4 divisors (see below), whose sum is σ = 22872265392. Its totient is φ = 17154199032.

The previous prime is 20013232193. The next prime is 20013232231. The reversal of 20013232211 is 11223231002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013232211 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 20013232211.

It is not an unprimeable number, because it can be changed into a prime (20013232231) 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, 1429516580 + ... + 1429516593.

It is an arithmetic number, because the mean of its divisors is an integer number (5718066348).

Almost surely, 2^20013232211 is an apocalyptic number.

20013232211 is a deficient number, since it is larger than the sum of its proper divisors (2859033181).

20013232211 is an equidigital number, since it uses as much as digits as its factorization.

20013232211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859033180.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20013232211 its reverse (11223231002), we get a palindrome (31236463213).

The spelling of 20013232211 in words is "twenty billion, thirteen million, two hundred thirty-two thousand, two hundred eleven".