20393771 has 8 divisors (see below), whose sum is σ = 21213120. Its totient is φ = 19588608.

The previous prime is 20393767. The next prime is 20393773. The reversal of 20393771 is 17739302.

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 20393771 - 2² = 20393767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20393773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 566 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (2651640).

Almost surely, 2^20393771 is an apocalyptic number.

20393771 is a deficient number, since it is larger than the sum of its proper divisors (819349).

20393771 is an equidigital number, since it uses as much as digits as its factorization.

20393771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 20393771 is about 4515.9463017179. The cubic root of 20393771 is about 273.2116281823.

The spelling of 20393771 in words is "twenty million, three hundred ninety-three thousand, seven hundred seventy-one".