20434503 has 8 divisors (see below), whose sum is σ = 27879808. Its totient is φ = 13306104.

The previous prime is 20434501. The next prime is 20434507. The reversal of 20434503 is 30543402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20434503 - 2¹ = 20434501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20434503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434501) 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, 79075 + ... + 79332.

It is an arithmetic number, because the mean of its divisors is an integer number (3484976).

Almost surely, 2^20434503 is an apocalyptic number.

20434503 is a deficient number, since it is larger than the sum of its proper divisors (7445305).

20434503 is a wasteful number, since it uses less digits than its factorization.

20434503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158453.

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

The square root of 20434503 is about 4520.4538488961. The cubic root of 20434503 is about 273.3934002763.

Adding to 20434503 its reverse (30543402), we get a palindrome (50977905).

The spelling of 20434503 in words is "twenty million, four hundred thirty-four thousand, five hundred three".