20023212011 has 6 divisors (see below), whose sum is σ = 22008985236. Its totient is φ = 18202919900.

The previous prime is 20023211981. The next prime is 20023212029. The reversal of 20023212011 is 11021232002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20023212011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023212311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82740425 + ... + 82740666.

It is an arithmetic number, because the mean of its divisors is an integer number (3668164206).

Almost surely, 2^20023212011 is an apocalyptic number.

20023212011 is a deficient number, since it is larger than the sum of its proper divisors (1985773225).

20023212011 is a wasteful number, since it uses less digits than its factorization.

20023212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165481113 (or 165481102 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20023212011 its reverse (11021232002), we get a palindrome (31044444013).

The spelling of 20023212011 in words is "twenty billion, twenty-three million, two hundred twelve thousand, eleven".