21326042 has 8 divisors (see below), whose sum is σ = 32010132. Its totient is φ = 10656000.

The previous prime is 21326021. The next prime is 21326069. The reversal of 21326042 is 24062312.

It can be written as a sum of positive squares in 2 ways, for example, as 20967241 + 358801 = 4579^2 + 599^2 .

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

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, 2042 + ... + 6842.

Almost surely, 2^21326042 is an apocalyptic number.

21326042 is a deficient number, since it is larger than the sum of its proper divisors (10684090).

21326042 is a wasteful number, since it uses less digits than its factorization.

21326042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7024.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 21326042 is about 4618.0127760759. The cubic root of 21326042 is about 277.3129090887.

Adding to 21326042 its reverse (24062312), we get a palindrome (45388354).

The spelling of 21326042 in words is "twenty-one million, three hundred twenty-six thousand, forty-two".