20424135 has 8 divisors (see below), whose sum is σ = 32678640. Its totient is φ = 10892864.

The previous prime is 20424113. The next prime is 20424137. The reversal of 20424135 is 53142402.

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

It is a cyclic number.

It is not a de Polignac number, because 20424135 - 2¹³ = 20415943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424137) 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, 680790 + ... + 680819.

It is an arithmetic number, because the mean of its divisors is an integer number (4084830).

Almost surely, 2^20424135 is an apocalyptic number.

20424135 is a deficient number, since it is larger than the sum of its proper divisors (12254505).

20424135 is a wasteful number, since it uses less digits than its factorization.

20424135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361617.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20424135 is about 4519.3069158888. The cubic root of 20424135 is about 273.3471545989.

Adding to 20424135 its reverse (53142402), we get a palindrome (73566537).

The spelling of 20424135 in words is "twenty million, four hundred twenty-four thousand, one hundred thirty-five".