20222178440 has 32 divisors (see below), whose sum is σ = 45504072000. Its totient is φ = 8088129984.

The previous prime is 20222178421. The next prime is 20222178451. The reversal of 20222178440 is 4487122202.

It is a junction number, because it is equal to n+sod(n) for n = 20222178397 and 20222178406.

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 7 ways as a sum of consecutive naturals, for example, 688781 + ... + 717539.

It is an arithmetic number, because the mean of its divisors is an integer number (1422002250).

Almost surely, 2^20222178440 is an apocalyptic number.

20222178440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20222178440 is an abundant number, since it is smaller than the sum of its proper divisors (25281893560).

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

20222178440 is a wasteful number, since it uses less digits than its factorization.

20222178440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46349 (or 46345 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 32.

The spelling of 20222178440 in words is "twenty billion, two hundred twenty-two million, one hundred seventy-eight thousand, four hundred forty".