22123013520 has 40 divisors (see below), whose sum is σ = 68581342656. Its totient is φ = 5899470208.

The previous prime is 22123013513. The next prime is 22123013531. The reversal of 22123013520 is 2531032122.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×22123013520² (a number of 21 digits) contains 22 as substring.

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, 46089372 + ... + 46089851.

Almost surely, 2^22123013520 is an apocalyptic number.

22123013520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22123013520 is an abundant number, since it is smaller than the sum of its proper divisors (46458329136).

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

22123013520 is a wasteful number, since it uses less digits than its factorization.

22123013520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92179239 (or 92179233 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 22123013520 its reverse (2531032122), we get a palindrome (24654045642).

The spelling of 22123013520 in words is "twenty-two billion, one hundred twenty-three million, thirteen thousand, five hundred twenty".