20400222223 has 4 divisors (see below), whose sum is σ = 20412491008. Its totient is φ = 20387953440.

The previous prime is 20400222149. The next prime is 20400222229. The reversal of 20400222223 is 32222200402.

It is a happy number.

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 20400222223 - 2²⁹ = 19863351311 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 20400222223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400222229) 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, 6131898 + ... + 6135223.

It is an arithmetic number, because the mean of its divisors is an integer number (5103122752).

Almost surely, 2^20400222223 is an apocalyptic number.

20400222223 is a deficient number, since it is larger than the sum of its proper divisors (12268785).

20400222223 is a wasteful number, since it uses less digits than its factorization.

20400222223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12268784.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20400222223 its reverse (32222200402), we get a palindrome (52622422625).

The spelling of 20400222223 in words is "twenty billion, four hundred million, two hundred twenty-two thousand, two hundred twenty-three".