21333741 has 24 divisors (see below), whose sum is σ = 33568416. Its totient is φ = 11881440.

The previous prime is 21333727. The next prime is 21333761. The reversal of 21333741 is 14733312.

It is not a de Polignac number, because 21333741 - 2⁶ = 21333677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95556 + ... + 95778.

It is an arithmetic number, because the mean of its divisors is an integer number (1398684).

Almost surely, 2^21333741 is an apocalyptic number.

It is an amenable number.

21333741 is a deficient number, since it is larger than the sum of its proper divisors (12234675).

21333741 is a wasteful number, since it uses less digits than its factorization.

21333741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 250 counting only the distinct ones).

The product of its digits is 1512, while the sum is 24.

The square root of 21333741 is about 4618.8462845174. The cubic root of 21333741 is about 277.3462763557.

The spelling of 21333741 in words is "twenty-one million, three hundred thirty-three thousand, seven hundred forty-one".