20235423 has 32 divisors (see below), whose sum is σ = 32126976. Its totient is φ = 11202048.

The previous prime is 20235421. The next prime is 20235431. The reversal of 20235423 is 32453202.

It is not a de Polignac number, because 20235423 - 2¹ = 20235421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20235423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14586 + ... + 15912.

It is an arithmetic number, because the mean of its divisors is an integer number (1003968).

Almost surely, 2^20235423 is an apocalyptic number.

20235423 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20235423 is a deficient number, since it is larger than the sum of its proper divisors (11891553).

20235423 is a wasteful number, since it uses less digits than its factorization.

20235423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20235423 is about 4498.3800417484. The cubic root of 20235423 is about 272.5026703439.

Adding to 20235423 its reverse (32453202), we get a palindrome (52688625).

The spelling of 20235423 in words is "twenty million, two hundred thirty-five thousand, four hundred twenty-three".