21026894 has 8 divisors (see below), whose sum is σ = 36046128. Its totient is φ = 9011520.

The previous prime is 21026881. The next prime is 21026903. The reversal of 21026894 is 49862012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21026894.

It is a congruent number.

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, 750947 + ... + 750974.

It is an arithmetic number, because the mean of its divisors is an integer number (4505766).

Almost surely, 2^21026894 is an apocalyptic number.

21026894 is a deficient number, since it is larger than the sum of its proper divisors (15019234).

21026894 is a wasteful number, since it uses less digits than its factorization.

21026894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501930.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 21026894 is about 4585.5091320376. The cubic root of 21026894 is about 276.0101428045.

The spelling of 21026894 in words is "twenty-one million, twenty-six thousand, eight hundred ninety-four".