20933423 has 8 divisors (see below), whose sum is σ = 24193440. Its totient is φ = 17740800.

The previous prime is 20933399. The next prime is 20933449. The reversal of 20933423 is 32433902.

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

It is not a de Polignac number, because 20933423 - 2¹⁰ = 20932399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20933392 and 20933401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20933483) 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, 16178 + ... + 17423.

It is an arithmetic number, because the mean of its divisors is an integer number (3024180).

Almost surely, 2^20933423 is an apocalyptic number.

20933423 is a deficient number, since it is larger than the sum of its proper divisors (3260017).

20933423 is an equidigital number, since it uses as much as digits as its factorization.

20933423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33697.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 20933423 is about 4575.3057821309. The cubic root of 20933423 is about 275.6005520073.

The spelling of 20933423 in words is "twenty million, nine hundred thirty-three thousand, four hundred twenty-three".