22551400420 has 12 divisors (see below), whose sum is σ = 47357940924. Its totient is φ = 9020560160.

The previous prime is 22551400397. The next prime is 22551400423. The reversal of 22551400420 is 2400415522.

It can be written as a sum of positive squares in 2 ways, for example, as 7976633344 + 14574767076 = 89312^2 + 120726^2 .

It is not an unprimeable number, because it can be changed into a prime (22551400423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563784991 + ... + 563785030.

It is an arithmetic number, because the mean of its divisors is an integer number (3946495077).

Almost surely, 2^22551400420 is an apocalyptic number.

22551400420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22551400420 is an abundant number, since it is smaller than the sum of its proper divisors (24806540504).

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

22551400420 is a wasteful number, since it uses less digits than its factorization.

22551400420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127570030 (or 1127570028 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 22551400420 its reverse (2400415522), we get a palindrome (24951815942).

The spelling of 22551400420 in words is "twenty-two billion, five hundred fifty-one million, four hundred thousand, four hundred twenty".