22154221420 has 48 divisors (see below), whose sum is σ = 46669347648. Its totient is φ = 8834031360.

The previous prime is 22154221409. The next prime is 22154221423. The reversal of 22154221420 is 2412245122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22154221423) 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 15 ways as a sum of consecutive naturals, for example, 12782874 + ... + 12784606.

It is an arithmetic number, because the mean of its divisors is an integer number (972278076).

Almost surely, 2^22154221420 is an apocalyptic number.

22154221420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22154221420 is an abundant number, since it is smaller than the sum of its proper divisors (24515126228).

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

22154221420 is a wasteful number, since it uses less digits than its factorization.

22154221420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3370 (or 3368 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 22154221420 its reverse (2412245122), we get a palindrome (24566466542).

The spelling of 22154221420 in words is "twenty-two billion, one hundred fifty-four million, two hundred twenty-one thousand, four hundred twenty".