20755886 has 4 divisors (see below), whose sum is σ = 31133832. Its totient is φ = 10377942.

The previous prime is 20755877. The next prime is 20755937. The reversal of 20755886 is 68855702.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5188970 + ... + 5188973.

It is an arithmetic number, because the mean of its divisors is an integer number (7783458).

Almost surely, 2^20755886 is an apocalyptic number.

20755886 is a deficient number, since it is larger than the sum of its proper divisors (10377946).

20755886 is a wasteful number, since it uses less digits than its factorization.

20755886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10377945.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 20755886 is about 4555.8628161963. The cubic root of 20755886 is about 274.8192134073.

The spelling of 20755886 in words is "twenty million, seven hundred fifty-five thousand, eight hundred eighty-six".