22001115520 has 64 divisors (see below), whose sum is σ = 54883254240. Its totient is φ = 8417812480.

The previous prime is 22001115509. The next prime is 22001115541. The reversal of 22001115520 is 2551110022.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732601 + ... + 762040.

Almost surely, 2^22001115520 is an apocalyptic number.

22001115520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001115520 is an abundant number, since it is smaller than the sum of its proper divisors (32882138720).

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

22001115520 is a wasteful number, since it uses less digits than its factorization.

22001115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494683 (or 1494671 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 22001115520 its reverse (2551110022), we get a palindrome (24552225542).

The spelling of 22001115520 in words is "twenty-two billion, one million, one hundred fifteen thousand, five hundred twenty".