21265794 has 32 divisors (see below), whose sum is σ = 51554880. Its totient is φ = 6444000.

The previous prime is 21265789. The next prime is 21265817. The reversal of 21265794 is 49756212.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17307 + ... + 18494.

It is an arithmetic number, because the mean of its divisors is an integer number (1611090).

Almost surely, 2^21265794 is an apocalyptic number.

21265794 is an abundant number, since it is smaller than the sum of its proper divisors (30289086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21265794 is a wasteful number, since it uses less digits than its factorization.

21265794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35823 (or 35817 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 21265794 is about 4611.4850102760. The cubic root of 21265794 is about 277.0515180887.

The spelling of 21265794 in words is "twenty-one million, two hundred sixty-five thousand, seven hundred ninety-four".