21443026 has 16 divisors (see below), whose sum is σ = 35185248. Its totient is φ = 9720000.

The previous prime is 21443003. The next prime is 21443033. The reversal of 21443026 is 62034412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 21442988 and 21443006.

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, 8401 + ... + 10651.

It is an arithmetic number, because the mean of its divisors is an integer number (2199078).

Almost surely, 2^21443026 is an apocalyptic number.

21443026 is a deficient number, since it is larger than the sum of its proper divisors (13742222).

21443026 is a wasteful number, since it uses less digits than its factorization.

21443026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21443026 is about 4630.6615078194. The cubic root of 21443026 is about 277.8190513722.

Adding to 21443026 its reverse (62034412), we get a palindrome (83477438).

The spelling of 21443026 in words is "twenty-one million, four hundred forty-three thousand, twenty-six".