20933943 has 8 divisors (see below), whose sum is σ = 28045056. Its totient is φ = 13889400.

The previous prime is 20933929. The next prime is 20933947. The reversal of 20933943 is 34933902.

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

It is not a de Polignac number, because 20933943 - 2¹² = 20929847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15903 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (3505632).

Almost surely, 2^20933943 is an apocalyptic number.

20933943 is a deficient number, since it is larger than the sum of its proper divisors (7111113).

20933943 is a wasteful number, since it uses less digits than its factorization.

20933943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33285.

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 20933943 is about 4575.3626085809. The cubic root of 20933943 is about 275.6028340215.

The spelling of 20933943 in words is "twenty million, nine hundred thirty-three thousand, nine hundred forty-three".