22018338420 has 48 divisors (see below), whose sum is σ = 66393761280. Its totient is φ = 5419898496.

The previous prime is 22018338413. The next prime is 22018338437. The reversal of 22018338420 is 2483381022.

It is a congruent number.

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, 14113540 + ... + 14115099.

It is an arithmetic number, because the mean of its divisors is an integer number (1383203360).

Almost surely, 2^22018338420 is an apocalyptic number.

22018338420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22018338420 is an abundant number, since it is smaller than the sum of its proper divisors (44375422860).

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

22018338420 is a wasteful number, since it uses less digits than its factorization.

22018338420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28228664 (or 28228662 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

It can be divided in two parts, 2201833 and 8420, that added together give a triangular number (2210253 = T₂₁₀₂).

The spelling of 22018338420 in words is "twenty-two billion, eighteen million, three hundred thirty-eight thousand, four hundred twenty".