21400322 has 8 divisors (see below), whose sum is σ = 32783616. Its totient is φ = 10472452.

The previous prime is 21400277. The next prime is 21400343. The reversal of 21400322 is 22300412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21400297 and 21400306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113738 + ... + 113925.

It is an arithmetic number, because the mean of its divisors is an integer number (4097952).

Almost surely, 2^21400322 is an apocalyptic number.

21400322 is a deficient number, since it is larger than the sum of its proper divisors (11383294).

21400322 is a wasteful number, since it uses less digits than its factorization.

21400322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227712.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21400322 is about 4626.0482055422. The cubic root of 21400322 is about 277.6345023376.

Adding to 21400322 its reverse (22300412), we get a palindrome (43700734).

The spelling of 21400322 in words is "twenty-one million, four hundred thousand, three hundred twenty-two".