20247423 has 16 divisors (see below), whose sum is σ = 31918080. Its totient is φ = 11170656.

The previous prime is 20247421. The next prime is 20247449. The reversal of 20247423 is 32474202.

It is not a de Polignac number, because 20247423 - 2¹ = 20247421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20247393 and 20247402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20247421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16015 + ... + 17232.

It is an arithmetic number, because the mean of its divisors is an integer number (1994880).

Almost surely, 2^20247423 is an apocalyptic number.

20247423 is a deficient number, since it is larger than the sum of its proper divisors (11670657).

20247423 is a wasteful number, since it uses less digits than its factorization.

20247423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33286.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 20247423 is about 4499.7136575564. The cubic root of 20247423 is about 272.5565261633.

The spelling of 20247423 in words is "twenty million, two hundred forty-seven thousand, four hundred twenty-three".