20434359 has 24 divisors (see below), whose sum is σ = 30700656. Its totient is φ = 12073600.

The previous prime is 20434321. The next prime is 20434369. The reversal of 20434359 is 95343402.

It is not a de Polignac number, because 20434359 - 2⁷ = 20434231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434319) 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 23 ways as a sum of consecutive naturals, for example, 14197 + ... + 15569.

It is an arithmetic number, because the mean of its divisors is an integer number (1279194).

Almost surely, 2^20434359 is an apocalyptic number.

20434359 is a deficient number, since it is larger than the sum of its proper divisors (10266297).

20434359 is a wasteful number, since it uses less digits than its factorization.

20434359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20434359 is about 4520.4379212638. The cubic root of 20434359 is about 273.3927580824.

It can be divided in two parts, 204343 and 59, that added together give a palindrome (204402).

The spelling of 20434359 in words is "twenty million, four hundred thirty-four thousand, three hundred fifty-nine".