22202001820 has 24 divisors (see below), whose sum is σ = 46628823024. Its totient is φ = 8879920896.

The previous prime is 22202001793. The next prime is 22202001839. The reversal of 22202001820 is 2810020222.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175492 + ... + 274228.

It is an arithmetic number, because the mean of its divisors is an integer number (1942867626).

Almost surely, 2^22202001820 is an apocalyptic number.

22202001820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22202001820 is an abundant number, since it is smaller than the sum of its proper divisors (24426821204).

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

22202001820 is a wasteful number, since it uses less digits than its factorization.

22202001820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109989 (or 109987 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The spelling of 22202001820 in words is "twenty-two billion, two hundred two million, one thousand, eight hundred twenty".