22445001540 has 216 divisors, whose sum is σ = 75442086720. Its totient is φ = 5396122368.

The previous prime is 22445001533. The next prime is 22445001563. The reversal of 22445001540 is 4510054422.

22445001540 is a `hidden beast` number, since 2 + 2 + 4 + 4 + 500 + 154 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1299481 + ... + 1316639.

It is an arithmetic number, because the mean of its divisors is an integer number (349268920).

Almost surely, 2^22445001540 is an apocalyptic number.

22445001540 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 22445001540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37721043360).

22445001540 is an abundant number, since it is smaller than the sum of its proper divisors (52997085180).

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

22445001540 is a wasteful number, since it uses less digits than its factorization.

22445001540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17243 (or 17225 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 22445001540 its reverse (4510054422), we get a palindrome (26955055962).

The spelling of 22445001540 in words is "twenty-two billion, four hundred forty-five million, one thousand, five hundred forty".