21033424422 has 96 divisors (see below), whose sum is σ = 51671992320. Its totient is φ = 6148327680.

The previous prime is 21033424337. The next prime is 21033424439. The reversal of 21033424422 is 22442433012.

21033424422 is a `hidden beast` number, since 210 + 3 + 3 + 4 + 2 + 442 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200718 + ... + 286974.

It is an arithmetic number, because the mean of its divisors is an integer number (538249920).

Almost surely, 2^21033424422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21033424422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25835996160).

21033424422 is an abundant number, since it is smaller than the sum of its proper divisors (30638567898).

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

21033424422 is a wasteful number, since it uses less digits than its factorization.

21033424422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86338 (or 86335 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 21033424422 its reverse (22442433012), we get a palindrome (43475857434).

The spelling of 21033424422 in words is "twenty-one billion, thirty-three million, four hundred twenty-four thousand, four hundred twenty-two".