20434323 has 72 divisors (see below), whose sum is σ = 37237872. Its totient is φ = 9870336.

The previous prime is 20434321. The next prime is 20434369. The reversal of 20434323 is 32343402.

It is not a de Polignac number, because 20434323 - 2¹ = 20434321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20434323.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434321) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 552261 + ... + 552297.

Almost surely, 2^20434323 is an apocalyptic number.

20434323 is a deficient number, since it is larger than the sum of its proper divisors (16803549).

20434323 is a wasteful number, since it uses less digits than its factorization.

20434323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 20434323 is about 4520.4339393470. The cubic root of 20434323 is about 273.3925975334.

Adding to 20434323 its reverse (32343402), we get a palindrome (52777725).

The spelling of 20434323 in words is "twenty million, four hundred thirty-four thousand, three hundred twenty-three".