20723793 has 8 divisors (see below), whose sum is σ = 27668448. Its totient is φ = 13797504.

The previous prime is 20723783. The next prime is 20723803. The reversal of 20723793 is 39732702.

It is an interprime number because it is at equal distance from previous prime (20723783) and next prime (20723803).

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

It is not a de Polignac number, because 20723793 - 2⁸ = 20723537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20723723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1696 + ... + 6657.

It is an arithmetic number, because the mean of its divisors is an integer number (3458556).

Almost surely, 2^20723793 is an apocalyptic number.

It is an amenable number.

20723793 is a deficient number, since it is larger than the sum of its proper divisors (6944655).

20723793 is an equidigital number, since it uses as much as digits as its factorization.

20723793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9183.

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 20723793 is about 4552.3392887613. The cubic root of 20723793 is about 274.6774974193.

The spelling of 20723793 in words is "twenty million, seven hundred twenty-three thousand, seven hundred ninety-three".