20323021011 has 16 divisors (see below), whose sum is σ = 27301294080. Its totient is φ = 13447042560.

The previous prime is 20323020979. The next prime is 20323021027. The reversal of 20323021011 is 11012032302.

It is not a de Polignac number, because 20323021011 - 2⁵ = 20323020979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20323025011) 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, 208830 + ... + 290268.

It is an arithmetic number, because the mean of its divisors is an integer number (1706330880).

Almost surely, 2^20323021011 is an apocalyptic number.

20323021011 is a deficient number, since it is larger than the sum of its proper divisors (6978273069).

20323021011 is a wasteful number, since it uses less digits than its factorization.

20323021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82066.

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

Adding to 20323021011 its reverse (11012032302), we get a palindrome (31335053313).

The spelling of 20323021011 in words is "twenty billion, three hundred twenty-three million, twenty-one thousand, eleven".