20431021222 has 16 divisors (see below), whose sum is σ = 30781670400. Its totient is φ = 10170543240.

The previous prime is 20431021183. The next prime is 20431021223. The reversal of 20431021222 is 22212013402.

It is a self number, because there is not a number n which added to its sum of digits gives 20431021222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431021223) 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, 515179 + ... + 553417.

It is an arithmetic number, because the mean of its divisors is an integer number (1923854400).

Almost surely, 2^20431021222 is an apocalyptic number.

20431021222 is a deficient number, since it is larger than the sum of its proper divisors (10350649178).

20431021222 is a wasteful number, since it uses less digits than its factorization.

20431021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39411.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20431021222 its reverse (22212013402), we get a palindrome (42643034624).

The spelling of 20431021222 in words is "twenty billion, four hundred thirty-one million, twenty-one thousand, two hundred twenty-two".