20755633 has 4 divisors (see below), whose sum is σ = 20957248. Its totient is φ = 20554020.

The previous prime is 20755613. The next prime is 20755649. The reversal of 20755633 is 33655702.

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 20755633 - 2⁹ = 20755121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20755595 and 20755604.

It is not an unprimeable number, because it can be changed into a prime (20755613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100653 + ... + 100858.

It is an arithmetic number, because the mean of its divisors is an integer number (5239312).

Almost surely, 2^20755633 is an apocalyptic number.

It is an amenable number.

20755633 is a deficient number, since it is larger than the sum of its proper divisors (201615).

20755633 is a wasteful number, since it uses less digits than its factorization.

20755633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201614.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 20755633 is about 4555.8350496918. The cubic root of 20755633 is about 274.8180967836.

The spelling of 20755633 in words is "twenty million, seven hundred fifty-five thousand, six hundred thirty-three".