20432423 has 6 divisors (see below), whose sum is σ = 22458912. Its totient is φ = 18574820.

The previous prime is 20432407. The next prime is 20432437. The reversal of 20432423 is 32423402.

It is not a de Polignac number, because 20432423 - 2⁴ = 20432407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20432395 and 20432404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84311 + ... + 84552.

It is an arithmetic number, because the mean of its divisors is an integer number (3743152).

Almost surely, 2^20432423 is an apocalyptic number.

20432423 is a deficient number, since it is larger than the sum of its proper divisors (2026489).

20432423 is a wasteful number, since it uses less digits than its factorization.

20432423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168885 (or 168874 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 20432423 is about 4520.2237776464. The cubic root of 20432423 is about 273.3841238486.

Adding to 20432423 its reverse (32423402), we get a palindrome (52855825).

The spelling of 20432423 in words is "twenty million, four hundred thirty-two thousand, four hundred twenty-three".