20755133 has 4 divisors (see below), whose sum is σ = 23720160. Its totient is φ = 17790108.

The previous prime is 20755129. The next prime is 20755139. The reversal of 20755133 is 33155702.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33155702 = 2 ⋅16577851.

It is not a de Polignac number, because 20755133 - 2² = 20755129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482503 + ... + 1482516.

It is an arithmetic number, because the mean of its divisors is an integer number (5930040).

Almost surely, 2^20755133 is an apocalyptic number.

It is an amenable number.

20755133 is a deficient number, since it is larger than the sum of its proper divisors (2965027).

20755133 is an equidigital number, since it uses as much as digits as its factorization.

20755133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965026.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 20755133 is about 4555.7801746792. The cubic root of 20755133 is about 274.8158899907.

The spelling of 20755133 in words is "twenty million, seven hundred fifty-five thousand, one hundred thirty-three".