20755793 has 8 divisors (see below), whose sum is σ = 22735080. Its totient is φ = 18860800.

The previous prime is 20755789. The next prime is 20755831. The reversal of 20755793 is 39755702.

It can be written as a sum of positive squares in 4 ways, for example, as 8596624 + 12159169 = 2932^2 + 3487^2 .

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 20755793 - 2² = 20755789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20755703) 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 7 ways as a sum of consecutive naturals, for example, 20558 + ... + 21543.

It is an arithmetic number, because the mean of its divisors is an integer number (2841885).

Almost surely, 2^20755793 is an apocalyptic number.

It is an amenable number.

20755793 is a deficient number, since it is larger than the sum of its proper divisors (1979287).

20755793 is a wasteful number, since it uses less digits than its factorization.

20755793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42147.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 20755793 is about 4555.8526095562. The cubic root of 20755793 is about 274.8188029498.

The spelling of 20755793 in words is "twenty million, seven hundred fifty-five thousand, seven hundred ninety-three".