22221927438900 has 144 divisors (see below), whose sum is σ = 73492945483776. Its totient is φ = 5078437879680.

The previous prime is 22221927438889. The next prime is 22221927438961. The reversal of 22221927438900 is 983472912222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11554017 + ... + 13339383.

Almost surely, 2^{22221927438900} is an apocalyptic number.

22221927438900 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 22221927438900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36746472741888).

22221927438900 is an abundant number, since it is smaller than the sum of its proper divisors (51271018044876).

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

22221927438900 is a wasteful number, since it uses less digits than its factorization.

22221927438900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791318 (or 1791311 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 22221927438900 in words is "twenty-two trillion, two hundred twenty-one billion, nine hundred twenty-seven million, four hundred thirty-eight thousand, nine hundred".