20533893 has 4 divisors (see below), whose sum is σ = 27378528. Its totient is φ = 13689260.

The previous prime is 20533883. The next prime is 20533897. The reversal of 20533893 is 39833502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20533893 - 2⁵ = 20533861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533897) 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 3 ways as a sum of consecutive naturals, for example, 3422313 + ... + 3422318.

It is an arithmetic number, because the mean of its divisors is an integer number (6844632).

Almost surely, 2^20533893 is an apocalyptic number.

It is an amenable number.

20533893 is a deficient number, since it is larger than the sum of its proper divisors (6844635).

20533893 is an equidigital number, since it uses as much as digits as its factorization.

20533893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6844634.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 20533893 is about 4531.4338790277. The cubic root of 20533893 is about 273.8359301555.

The spelling of 20533893 in words is "twenty million, five hundred thirty-three thousand, eight hundred ninety-three".