20312222021 has 32 divisors (see below), whose sum is σ = 25945920000. Its totient is φ = 15466510080.

The previous prime is 20312221921. The next prime is 20312222027. The reversal of 20312222021 is 12022221302.

It is not a de Polignac number, because 20312222021 - 2²² = 20308027717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312222027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 808355 + ... + 833103.

It is an arithmetic number, because the mean of its divisors is an integer number (810810000).

Almost surely, 2^20312222021 is an apocalyptic number.

It is an amenable number.

20312222021 is a deficient number, since it is larger than the sum of its proper divisors (5633697979).

20312222021 is a wasteful number, since it uses less digits than its factorization.

20312222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25109.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20312222021 its reverse (12022221302), we get a palindrome (32334443323).

The spelling of 20312222021 in words is "twenty billion, three hundred twelve million, two hundred twenty-two thousand, twenty-one".