21434201 has 8 divisors (see below), whose sum is σ = 21840000. Its totient is φ = 21031920.

The previous prime is 21434177. The next prime is 21434213. The reversal of 21434201 is 10243412.

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 21434201 - 2¹⁸ = 21172057 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 21434201.

It is not an unprimeable number, because it can be changed into a prime (21434221) 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 7 ways as a sum of consecutive naturals, for example, 13550 + ... + 15048.

It is an arithmetic number, because the mean of its divisors is an integer number (2730000).

Almost surely, 2^21434201 is an apocalyptic number.

It is an amenable number.

21434201 is a deficient number, since it is larger than the sum of its proper divisors (405799).

21434201 is a wasteful number, since it uses less digits than its factorization.

21434201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21434201 is about 4629.7085221426. The cubic root of 21434201 is about 277.7809334693.

Adding to 21434201 its reverse (10243412), we get a palindrome (31677613).

The spelling of 21434201 in words is "twenty-one million, four hundred thirty-four thousand, two hundred one".