20953886 has 8 divisors (see below), whose sum is σ = 31542744. Its totient is φ = 10439640.

The previous prime is 20953883. The next prime is 20953901. The reversal of 20953886 is 68835902.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953883) 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 3 ways as a sum of consecutive naturals, for example, 17945 + ... + 19076.

It is an arithmetic number, because the mean of its divisors is an integer number (3942843).

Almost surely, 2^20953886 is an apocalyptic number.

20953886 is a deficient number, since it is larger than the sum of its proper divisors (10588858).

20953886 is a wasteful number, since it uses less digits than its factorization.

20953886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37306.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 20953886 is about 4577.5414798776. The cubic root of 20953886 is about 275.6903251493.

The spelling of 20953886 in words is "twenty million, nine hundred fifty-three thousand, eight hundred eighty-six".