22523111002420 has 144 divisors (see below), whose sum is σ = 56861943570432. Its totient is φ = 7464377249280.

The previous prime is 22523111002387. The next prime is 22523111002423. The reversal of 22523111002420 is 2420011132522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22523111002423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25603117 + ... + 26468203.

It is an arithmetic number, because the mean of its divisors is an integer number (394874608128).

Almost surely, 2^{22523111002420} is an apocalyptic number.

22523111002420 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 22523111002420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28430971785216).

22523111002420 is an abundant number, since it is smaller than the sum of its proper divisors (34338832568012).

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

22523111002420 is a wasteful number, since it uses less digits than its factorization.

22523111002420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865998 (or 865989 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 22523111002420 its reverse (2420011132522), we get a palindrome (24943122134942).

The spelling of 22523111002420 in words is "twenty-two trillion, five hundred twenty-three billion, one hundred eleven million, two thousand, four hundred twenty".