21362426 has 8 divisors (see below), whose sum is σ = 32080320. Its totient is φ = 10668988.

The previous prime is 21362417. The next prime is 21362447. The reversal of 21362426 is 62426312.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21362395 and 21362404.

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, 3746 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (4010040).

Almost surely, 2^21362426 is an apocalyptic number.

21362426 is a deficient number, since it is larger than the sum of its proper divisors (10717894).

21362426 is a wasteful number, since it uses less digits than its factorization.

21362426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12228.

The product of its digits is 3456, while the sum is 26.

The square root of 21362426 is about 4621.9504540832. The cubic root of 21362426 is about 277.4705257768.

Adding to 21362426 its reverse (62426312), we get a palindrome (83788738).

The spelling of 21362426 in words is "twenty-one million, three hundred sixty-two thousand, four hundred twenty-six".