21336026 has 16 divisors (see below), whose sum is σ = 32828544. Its totient is φ = 10395264.

The previous prime is 21336017. The next prime is 21336047. The reversal of 21336026 is 62063312.

It is a junction number, because it is equal to n+sod(n) for n = 21335992 and 21336010.

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, 32861 + ... + 33503.

It is an arithmetic number, because the mean of its divisors is an integer number (2051784).

Almost surely, 2^21336026 is an apocalyptic number.

21336026 is a deficient number, since it is larger than the sum of its proper divisors (11492518).

21336026 is a wasteful number, since it uses less digits than its factorization.

21336026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 21336026 is about 4619.0936340369. The cubic root of 21336026 is about 277.3561779418.

Adding to 21336026 its reverse (62063312), we get a palindrome (83399338).

The spelling of 21336026 in words is "twenty-one million, three hundred thirty-six thousand, twenty-six".