21260334 has 8 divisors (see below), whose sum is σ = 42520680. Its totient is φ = 7086776.

The previous prime is 21260329. The next prime is 21260359. The reversal of 21260334 is 43306212.

It is a happy number.

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

21260334 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21260334.

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, 1771689 + ... + 1771700.

It is an arithmetic number, because the mean of its divisors is an integer number (5315085).

Almost surely, 2^21260334 is an apocalyptic number.

21260334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21260334 is a wasteful number, since it uses less digits than its factorization.

21260334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543394.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 21260334 is about 4610.8929720825. The cubic root of 21260334 is about 277.0278050347.

Adding to 21260334 its reverse (43306212), we get a palindrome (64566546).

The spelling of 21260334 in words is "twenty-one million, two hundred sixty thousand, three hundred thirty-four".