20677723 has 8 divisors (see below), whose sum is σ = 22591296. Its totient is φ = 18769800.

The previous prime is 20677717. The next prime is 20677733. The reversal of 20677723 is 32777602.

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 20677723 - 2¹³ = 20669531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20677733) 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, 11140 + ... + 12862.

It is an arithmetic number, because the mean of its divisors is an integer number (2823912).

Almost surely, 2^20677723 is an apocalyptic number.

20677723 is a deficient number, since it is larger than the sum of its proper divisors (1913573).

20677723 is a wasteful number, since it uses less digits than its factorization.

20677723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 20677723 is about 4547.2764376053. The cubic root of 20677723 is about 274.4738059263.

The spelling of 20677723 in words is "twenty million, six hundred seventy-seven thousand, seven hundred twenty-three".