20435424 has 24 divisors (see below), whose sum is σ = 53643240. Its totient is φ = 6811776.

The previous prime is 20435423. The next prime is 20435447. The reversal of 20435424 is 42453402.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20435394 and 20435403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20435423) 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 3 ways as a sum of consecutive naturals, for example, 106339 + ... + 106530.

It is an arithmetic number, because the mean of its divisors is an integer number (2235135).

Almost surely, 2^20435424 is an apocalyptic number.

20435424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20435424 is an abundant number, since it is smaller than the sum of its proper divisors (33207816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20435424 is a wasteful number, since it uses less digits than its factorization.

20435424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212882 (or 212874 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 20435424 is about 4520.5557180506. Note that the first 3 decimals coincide. The cubic root of 20435424 is about 273.3975075704.

Adding to 20435424 its reverse (42453402), we get a palindrome (62888826).

The spelling of 20435424 in words is "twenty million, four hundred thirty-five thousand, four hundred twenty-four".