20212311023 has 4 divisors (see below), whose sum is σ = 20864321088. Its totient is φ = 19560300960.

The previous prime is 20212311011. The next prime is 20212311071. The reversal of 20212311023 is 32011321202.

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

It is a cyclic number.

It is not a de Polignac number, because 20212311023 - 2²⁶ = 20145202159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212310992 and 20212311010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212311083) 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 3 ways as a sum of consecutive naturals, for example, 326004986 + ... + 326005047.

It is an arithmetic number, because the mean of its divisors is an integer number (5216080272).

Almost surely, 2^20212311023 is an apocalyptic number.

20212311023 is a deficient number, since it is larger than the sum of its proper divisors (652010065).

20212311023 is an equidigital number, since it uses as much as digits as its factorization.

20212311023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652010064.

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

Adding to 20212311023 its reverse (32011321202), we get a palindrome (52223632225).

The spelling of 20212311023 in words is "twenty billion, two hundred twelve million, three hundred eleven thousand, twenty-three".