21320040022 has 16 divisors (see below), whose sum is σ = 32056020000. Its totient is φ = 10634719680.

The previous prime is 21320040013. The next prime is 21320040023. The reversal of 21320040022 is 22004002312.

It is a junction number, because it is equal to n+sod(n) for n = 21320039978 and 21320040005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320040023) 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, 3705604 + ... + 3711352.

It is an arithmetic number, because the mean of its divisors is an integer number (2003501250).

Almost surely, 2^21320040022 is an apocalyptic number.

21320040022 is a deficient number, since it is larger than the sum of its proper divisors (10735979978).

21320040022 is a wasteful number, since it uses less digits than its factorization.

21320040022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9831.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21320040022 its reverse (22004002312), we get a palindrome (43324042334).

The spelling of 21320040022 in words is "twenty-one billion, three hundred twenty million, forty thousand, twenty-two".