20755903 has 8 divisors (see below), whose sum is σ = 23748608. Its totient is φ = 17770104.

The previous prime is 20755877. The next prime is 20755937. The reversal of 20755903 is 30955702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20755903 - 2¹⁷ = 20624831 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 (20755303) 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, 10750 + ... + 12532.

It is an arithmetic number, because the mean of its divisors is an integer number (2968576).

Almost surely, 2^20755903 is an apocalyptic number.

20755903 is a deficient number, since it is larger than the sum of its proper divisors (2992705).

20755903 is a wasteful number, since it uses less digits than its factorization.

20755903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 20755903 is about 4555.8646819237. The cubic root of 20755903 is about 274.8192884370.

The spelling of 20755903 in words is "twenty million, seven hundred fifty-five thousand, nine hundred three".