21302422 has 16 divisors (see below), whose sum is σ = 32953680. Its totient is φ = 10323072.

The previous prime is 21302419. The next prime is 21302447. The reversal of 21302422 is 22420312.

It is a junction number, because it is equal to n+sod(n) for n = 21302396 and 21302405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7378 + ... + 9850.

It is an arithmetic number, because the mean of its divisors is an integer number (2059605).

Almost surely, 2^21302422 is an apocalyptic number.

21302422 is a deficient number, since it is larger than the sum of its proper divisors (11651258).

21302422 is a wasteful number, since it uses less digits than its factorization.

21302422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21302422 is about 4615.4546904937. The cubic root of 21302422 is about 277.2104904803.

Adding to 21302422 its reverse (22420312), we get a palindrome (43722734).

The spelling of 21302422 in words is "twenty-one million, three hundred two thousand, four hundred twenty-two".