20012232223 has 4 divisors (see below), whose sum is σ = 20023649968. Its totient is φ = 20000814480.

The previous prime is 20012232199. The next prime is 20012232263. The reversal of 20012232223 is 32223221002.

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 20012232223 - 2⁹ = 20012231711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012232223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012232263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5706243 + ... + 5709748.

It is an arithmetic number, because the mean of its divisors is an integer number (5005912492).

Almost surely, 2^20012232223 is an apocalyptic number.

20012232223 is a deficient number, since it is larger than the sum of its proper divisors (11417745).

20012232223 is a wasteful number, since it uses less digits than its factorization.

20012232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11417744.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20012232223 its reverse (32223221002), we get a palindrome (52235453225).

The spelling of 20012232223 in words is "twenty billion, twelve million, two hundred thirty-two thousand, two hundred twenty-three".