21201430 has 8 divisors (see below), whose sum is σ = 38162592. Its totient is φ = 8480568.

The previous prime is 21201421. The next prime is 21201443. The reversal of 21201430 is 3410212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21201430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060062 + ... + 1060081.

It is an arithmetic number, because the mean of its divisors is an integer number (4770324).

Almost surely, 2^21201430 is an apocalyptic number.

21201430 is a deficient number, since it is larger than the sum of its proper divisors (16961162).

21201430 is a wasteful number, since it uses less digits than its factorization.

21201430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120150.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21201430 is about 4604.5010587468. The cubic root of 21201430 is about 276.7717234611.

Adding to 21201430 its reverse (3410212), we get a palindrome (24611642).

The spelling of 21201430 in words is "twenty-one million, two hundred one thousand, four hundred thirty".