20385723 has 8 divisors (see below), whose sum is σ = 27225936. Its totient is φ = 13568000.

The previous prime is 20385719. The next prime is 20385731. The reversal of 20385723 is 32758302.

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 20385723 - 2² = 20385719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20385763) 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, 3378 + ... + 7223.

It is an arithmetic number, because the mean of its divisors is an integer number (3403242).

Almost surely, 2^20385723 is an apocalyptic number.

20385723 is a deficient number, since it is larger than the sum of its proper divisors (6840213).

20385723 is a wasteful number, since it uses less digits than its factorization.

20385723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20385723 is about 4515.0551491648. The cubic root of 20385723 is about 273.1756842579.

The spelling of 20385723 in words is "twenty million, three hundred eighty-five thousand, seven hundred twenty-three".