21422382 has 16 divisors (see below), whose sum is σ = 42915072. Its totient is φ = 7129080.

The previous prime is 21422381. The next prime is 21422399. The reversal of 21422382 is 28322412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563 + ... + 6729.

It is an arithmetic number, because the mean of its divisors is an integer number (2682192).

Almost surely, 2^21422382 is an apocalyptic number.

21422382 is an abundant number, since it is smaller than the sum of its proper divisors (21492690).

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

21422382 is a wasteful number, since it uses less digits than its factorization.

21422382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5863.

The product of its digits is 1536, while the sum is 24.

The square root of 21422382 is about 4628.4319158868. The cubic root of 21422382 is about 277.7298671621.

Adding to 21422382 its reverse (28322412), we get a palindrome (49744794).

The spelling of 21422382 in words is "twenty-one million, four hundred twenty-two thousand, three hundred eighty-two".