21214735 has 8 divisors (see below), whose sum is σ = 26797680. Its totient is φ = 16078464.

The previous prime is 21214703. The next prime is 21214741. The reversal of 21214735 is 53741212.

It is a happy number.

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 21214735 - 2⁵ = 21214703 is a prime.

It is a super-2 number, since 2×21214735² = 900129962240450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 111562 + ... + 111751.

It is an arithmetic number, because the mean of its divisors is an integer number (3349710).

Almost surely, 2^21214735 is an apocalyptic number.

21214735 is a deficient number, since it is larger than the sum of its proper divisors (5582945).

21214735 is a wasteful number, since it uses less digits than its factorization.

21214735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223337.

The product of its digits is 1680, while the sum is 25.

The square root of 21214735 is about 4605.9456140949. The cubic root of 21214735 is about 276.8296075714.

Adding to 21214735 its reverse (53741212), we get a palindrome (74955947).

The spelling of 21214735 in words is "twenty-one million, two hundred fourteen thousand, seven hundred thirty-five".