22018720020 has 48 divisors (see below), whose sum is σ = 67257183168. Its totient is φ = 5337871360.

The previous prime is 22018720013. The next prime is 22018720039. The reversal of 22018720020 is 2002781022.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16680189 + ... + 16681508.

It is an arithmetic number, because the mean of its divisors is an integer number (1401191316).

Almost surely, 2^22018720020 is an apocalyptic number.

22018720020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22018720020 is an abundant number, since it is smaller than the sum of its proper divisors (45238463148).

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

22018720020 is a wasteful number, since it uses less digits than its factorization.

22018720020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33361720 (or 33361718 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The spelling of 22018720020 in words is "twenty-two billion, eighteen million, seven hundred twenty thousand, twenty".