22120154440 has 16 divisors (see below), whose sum is σ = 49770347580. Its totient is φ = 8848061760.

The previous prime is 22120154423. The next prime is 22120154461. The reversal of 22120154440 is 4445102122.

It can be written as a sum of positive squares in 2 ways, for example, as 21994669636 + 125484804 = 148306^2 + 11202^2 .

22120154440 is a modest number, since divided by 154440 gives 22120 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276501891 + ... + 276501970.

Almost surely, 2^22120154440 is an apocalyptic number.

22120154440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120154440 is an abundant number, since it is smaller than the sum of its proper divisors (27650193140).

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

22120154440 is a wasteful number, since it uses less digits than its factorization.

22120154440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553003872 (or 553003868 counting only the distinct ones).

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

Adding to 22120154440 its reverse (4445102122), we get a palindrome (26565256562).

The spelling of 22120154440 in words is "twenty-two billion, one hundred twenty million, one hundred fifty-four thousand, four hundred forty".