21358322 has 4 divisors (see below), whose sum is σ = 32037486. Its totient is φ = 10679160.

The previous prime is 21358321. The next prime is 21358339. The reversal of 21358322 is 22385312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19722481 + 1635841 = 4441^2 + 1279^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21358291 and 21358300.

It is not an unprimeable number, because it can be changed into a prime (21358321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5339579 + ... + 5339582.

Almost surely, 2^21358322 is an apocalyptic number.

21358322 is a deficient number, since it is larger than the sum of its proper divisors (10679164).

21358322 is a wasteful number, since it uses less digits than its factorization.

21358322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10679163.

The product of its digits is 2880, while the sum is 26.

The square root of 21358322 is about 4621.5064643469. The cubic root of 21358322 is about 277.4527560727.

The spelling of 21358322 in words is "twenty-one million, three hundred fifty-eight thousand, three hundred twenty-two".