20522021543340 has 48 divisors (see below), whose sum is σ = 57465715864032. Its totient is φ = 5472152836096.

The previous prime is 20522021543339. The next prime is 20522021543377. The reversal of 20522021543340 is 4334512022502.

It is a super-2 number, since 2×20522021543340² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11212359 + ... + 12913598.

It is an arithmetic number, because the mean of its divisors is an integer number (1197202413834).

Almost surely, 2^{20522021543340} is an apocalyptic number.

20522021543340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20522021543340 is an abundant number, since it is smaller than the sum of its proper divisors (36943694320692).

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

20522021543340 is a wasteful number, since it uses less digits than its factorization.

20522021543340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24140146 (or 24140144 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 20522021543340 its reverse (4334512022502), we get a palindrome (24856533565842).

The spelling of 20522021543340 in words is "twenty trillion, five hundred twenty-two billion, twenty-one million, five hundred forty-three thousand, three hundred forty".