21422735 has 8 divisors (see below), whose sum is σ = 26593920. Its totient is φ = 16547104.

The previous prime is 21422717. The next prime is 21422743. The reversal of 21422735 is 53722412.

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 21422735 - 2¹⁰ = 21421711 is a prime.

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, 73727 + ... + 74016.

It is an arithmetic number, because the mean of its divisors is an integer number (3324240).

Almost surely, 2^21422735 is an apocalyptic number.

21422735 is a deficient number, since it is larger than the sum of its proper divisors (5171185).

21422735 is a wasteful number, since it uses less digits than its factorization.

21422735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147777.

The product of its digits is 3360, while the sum is 26.

The square root of 21422735 is about 4628.4700495952. The cubic root of 21422735 is about 277.7313926399.

The spelling of 21422735 in words is "twenty-one million, four hundred twenty-two thousand, seven hundred thirty-five".