22204434431 has 4 divisors (see below), whose sum is σ = 22222741032. Its totient is φ = 22186127832.

The previous prime is 22204434397. The next prime is 22204434457. The reversal of 22204434431 is 13443440222.

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 22204434431 - 2⁶ = 22204434367 is a prime.

It is a super-2 number, since 2×22204434431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22204434394 and 22204434403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22204434731) 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, 9151481 + ... + 9153906.

It is an arithmetic number, because the mean of its divisors is an integer number (5555685258).

Almost surely, 2^22204434431 is an apocalyptic number.

22204434431 is a deficient number, since it is larger than the sum of its proper divisors (18306601).

22204434431 is a wasteful number, since it uses less digits than its factorization.

22204434431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18306600.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 22204434431 its reverse (13443440222), we get a palindrome (35647874653).

The spelling of 22204434431 in words is "twenty-two billion, two hundred four million, four hundred thirty-four thousand, four hundred thirty-one".