20493723 has 8 divisors (see below), whose sum is σ = 28763200. Its totient is φ = 12943368.

The previous prime is 20493719. The next prime is 20493731. The reversal of 20493723 is 32739402.

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

It is not a de Polignac number, because 20493723 - 2² = 20493719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20493773) 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, 179713 + ... + 179826.

It is an arithmetic number, because the mean of its divisors is an integer number (3595400).

Almost surely, 2^20493723 is an apocalyptic number.

20493723 is a deficient number, since it is larger than the sum of its proper divisors (8269477).

20493723 is a wasteful number, since it uses less digits than its factorization.

20493723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359561.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 20493723 is about 4526.9993373094. Note that the first 3 decimals coincide. The cubic root of 20493723 is about 273.6572471990.

The spelling of 20493723 in words is "twenty million, four hundred ninety-three thousand, seven hundred twenty-three".