21365334 has 12 divisors (see below), whose sum is σ = 46291596. Its totient is φ = 7121772.

The previous prime is 21365303. The next prime is 21365347. The reversal of 21365334 is 43356312.

It is a happy number.

21365334 is a `hidden beast` number, since 2 + 1 + 3 + 653 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21365298 and 21365307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593464 + ... + 593499.

It is an arithmetic number, because the mean of its divisors is an integer number (3857633).

Almost surely, 2^21365334 is an apocalyptic number.

21365334 is an abundant number, since it is smaller than the sum of its proper divisors (24926262).

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

21365334 is a wasteful number, since it uses less digits than its factorization.

21365334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186971 (or 1186968 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 21365334 is about 4622.2650291821. The cubic root of 21365334 is about 277.4831156028.

The spelling of 21365334 in words is "twenty-one million, three hundred sixty-five thousand, three hundred thirty-four".