20312232222 has 16 divisors (see below), whose sum is σ = 41004133632. Its totient is φ = 6707465880.

The previous prime is 20312232217. The next prime is 20312232223. The reversal of 20312232222 is 22223221302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312232223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15818854 + ... + 15820137.

It is an arithmetic number, because the mean of its divisors is an integer number (2562758352).

Almost surely, 2^20312232222 is an apocalyptic number.

20312232222 is an abundant number, since it is smaller than the sum of its proper divisors (20691901410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20312232222 is a wasteful number, since it uses less digits than its factorization.

20312232222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31639103.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20312232222 its reverse (22223221302), we get a palindrome (42535453524).

The spelling of 20312232222 in words is "twenty billion, three hundred twelve million, two hundred thirty-two thousand, two hundred twenty-two".