21701733 has 8 divisors (see below), whose sum is σ = 29551488. Its totient is φ = 14159904.

The previous prime is 21701731. The next prime is 21701737. The reversal of 21701733 is 33710712.

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

It is not a de Polignac number, because 21701733 - 2¹ = 21701731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76816 + ... + 77097.

It is an arithmetic number, because the mean of its divisors is an integer number (3693936).

Almost surely, 2^21701733 is an apocalyptic number.

It is an amenable number.

21701733 is a deficient number, since it is larger than the sum of its proper divisors (7849755).

21701733 is a wasteful number, since it uses less digits than its factorization.

21701733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153963.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 21701733 is about 4658.5118868583. The cubic root of 21701733 is about 278.9318701594.

The spelling of 21701733 in words is "twenty-one million, seven hundred one thousand, seven hundred thirty-three".