20111202323 has 16 divisors (see below), whose sum is σ = 21115662336. Its totient is φ = 19117781760.

The previous prime is 20111202311. The next prime is 20111202329. The reversal of 20111202323 is 32320211102.

It is a cyclic number.

It is not a de Polignac number, because 20111202323 - 2²⁴ = 20094425107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111202329) 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, 7567811 + ... + 7570467.

It is an arithmetic number, because the mean of its divisors is an integer number (1319728896).

Almost surely, 2^20111202323 is an apocalyptic number.

20111202323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20111202323 is a deficient number, since it is larger than the sum of its proper divisors (1004460013).

20111202323 is a wasteful number, since it uses less digits than its factorization.

20111202323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594.

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

Adding to 20111202323 its reverse (32320211102), we get a palindrome (52431413425).

The spelling of 20111202323 in words is "twenty billion, one hundred eleven million, two hundred two thousand, three hundred twenty-three".