22011559920 has 640 divisors, whose sum is σ = 90325647360. Its totient is φ = 4821120000.

The previous prime is 22011559919. The next prime is 22011559967. The reversal of 22011559920 is 2995511022.

It is a happy number.

22011559920 is a `hidden beast` number, since 2 + 2 + 0 + 11 + 559 + 92 + 0 = 666.

It is a super-2 number, since 2×22011559920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70776565 + ... + 70776875.

It is an arithmetic number, because the mean of its divisors is an integer number (141133824).

Almost surely, 2^22011559920 is an apocalyptic number.

22011559920 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 22011559920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45162823680).

22011559920 is an abundant number, since it is smaller than the sum of its proper divisors (68314087440).

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

22011559920 is a wasteful number, since it uses less digits than its factorization.

22011559920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 22011559920 in words is "twenty-two billion, eleven million, five hundred fifty-nine thousand, nine hundred twenty".