21434277 has 8 divisors (see below), whose sum is σ = 29564640. Its totient is φ = 13796720.

The previous prime is 21434269. The next prime is 21434279. The reversal of 21434277 is 77243412.

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 21434277 - 2³ = 21434269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434279) 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, 123099 + ... + 123272.

It is an arithmetic number, because the mean of its divisors is an integer number (3695580).

Almost surely, 2^21434277 is an apocalyptic number.

It is an amenable number.

21434277 is a deficient number, since it is larger than the sum of its proper divisors (8130363).

21434277 is a wasteful number, since it uses less digits than its factorization.

21434277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246403.

The product of its digits is 9408, while the sum is 30.

The square root of 21434277 is about 4629.7167299955. The cubic root of 21434277 is about 277.7812617815.

Adding to 21434277 its reverse (77243412), we get a palindrome (98677689).

The spelling of 21434277 in words is "twenty-one million, four hundred thirty-four thousand, two hundred seventy-seven".