22031320032 has 48 divisors (see below), whose sum is σ = 64258019280. Its totient is φ = 7343773056.

The previous prime is 22031320007. The next prime is 22031320057. The reversal of 22031320032 is 23002313022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22031320007) and next prime (22031320057).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22031319987 and 22031320014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12748743 + ... + 12750470.

It is an arithmetic number, because the mean of its divisors is an integer number (1338708735).

Almost surely, 2^22031320032 is an apocalyptic number.

It is an amenable number.

22031320032 is an abundant number, since it is smaller than the sum of its proper divisors (42226699248).

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

22031320032 is a wasteful number, since it uses less digits than its factorization.

22031320032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25499232 (or 25499218 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 22031320032 its reverse (23002313022), we get a palindrome (45033633054).

The spelling of 22031320032 in words is "twenty-two billion, thirty-one million, three hundred twenty thousand, thirty-two".