20704423 has 8 divisors (see below), whose sum is σ = 21400688. Its totient is φ = 20015424.

The previous prime is 20704417. The next prime is 20704447. The reversal of 20704423 is 32440702.

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 20704423 - 2¹⁷ = 20573351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20704394 and 20704403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704403) 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, 4315 + ... + 7747.

It is an arithmetic number, because the mean of its divisors is an integer number (2675086).

Almost surely, 2^20704423 is an apocalyptic number.

20704423 is a deficient number, since it is larger than the sum of its proper divisors (696265).

20704423 is a wasteful number, since it uses less digits than its factorization.

20704423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633.

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 20704423 is about 4550.2113137743. The cubic root of 20704423 is about 274.5918927292.

The spelling of 20704423 in words is "twenty million, seven hundred four thousand, four hundred twenty-three".