22403243520 has 640 divisors, whose sum is σ = 95772441600. Its totient is φ = 4849238016.

The previous prime is 22403243483. The next prime is 22403243521. The reversal of 22403243520 is 2534230422.

It is a happy number.

22403243520 is a `hidden beast` number, since 224 + 0 + 3 + 2 + 435 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22403243521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9191742 + ... + 9194178.

It is an arithmetic number, because the mean of its divisors is an integer number (149644440).

Almost surely, 2^22403243520 is an apocalyptic number.

22403243520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22403243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47886220800).

22403243520 is an abundant number, since it is smaller than the sum of its proper divisors (73369198080).

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

22403243520 is a wasteful number, since it uses less digits than its factorization.

22403243520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495 (or 2473 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

Adding to 22403243520 its reverse (2534230422), we get a palindrome (24937473942).

The spelling of 22403243520 in words is "twenty-two billion, four hundred three million, two hundred forty-three thousand, five hundred twenty".