21938935 has 8 divisors (see below), whose sum is σ = 27234720. Its totient is φ = 16945824.

The previous prime is 21938923. The next prime is 21938947. The reversal of 21938935 is 53983912.

It is an interprime number because it is at equal distance from previous prime (21938923) and next prime (21938947).

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

It is a cyclic number.

It is not a de Polignac number, because 21938935 - 2¹³ = 21930743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75507 + ... + 75796.

It is an arithmetic number, because the mean of its divisors is an integer number (3404340).

Almost surely, 2^21938935 is an apocalyptic number.

21938935 is a deficient number, since it is larger than the sum of its proper divisors (5295785).

21938935 is a wasteful number, since it uses less digits than its factorization.

21938935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151337.

The product of its digits is 58320, while the sum is 40.

The square root of 21938935 is about 4683.9016855609. The cubic root of 21938935 is about 279.9444405069.

The spelling of 21938935 in words is "twenty-one million, nine hundred thirty-eight thousand, nine hundred thirty-five".