22065772219920 has 640 divisors, whose sum is σ = 91705135495680. Its totient is φ = 4804338769920.

The previous prime is 22065772219901. The next prime is 22065772220029. The reversal of 22065772219920 is 2991227756022.

22065772219920 is a `hidden beast` number, since 2 + 20 + 6 + 577 + 2 + 21 + 9 + 9 + 20 = 666.

It is a super-2 number, since 2×22065772219920² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 127 ways as a sum of consecutive naturals, for example, 10463182 + ... + 12393938.

It is an arithmetic number, because the mean of its divisors is an integer number (143289274212).

Almost surely, 2^{22065772219920} is an apocalyptic number.

22065772219920 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 22065772219920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45852567747840).

22065772219920 is an abundant number, since it is smaller than the sum of its proper divisors (69639363275760).

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

22065772219920 is a wasteful number, since it uses less digits than its factorization.

22065772219920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1930840 (or 1930828 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 22065772219920 in words is "twenty-two trillion, sixty-five billion, seven hundred seventy-two million, two hundred nineteen thousand, nine hundred twenty".