20035421 has 4 divisors (see below), whose sum is σ = 22897632. Its totient is φ = 17173212.

The previous prime is 20035409. The next prime is 20035441. The reversal of 20035421 is 12453002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20035421 - 2⁶ = 20035357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20035421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20035441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431095 + ... + 1431108.

It is an arithmetic number, because the mean of its divisors is an integer number (5724408).

Almost surely, 2^20035421 is an apocalyptic number.

It is an amenable number.

20035421 is a deficient number, since it is larger than the sum of its proper divisors (2862211).

20035421 is an equidigital number, since it uses as much as digits as its factorization.

20035421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862210.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20035421 is about 4476.0943913193. The cubic root of 20035421 is about 271.6019127954.

Adding to 20035421 its reverse (12453002), we get a palindrome (32488423).

The spelling of 20035421 in words is "twenty million, thirty-five thousand, four hundred twenty-one".