21347277 has 16 divisors (see below), whose sum is σ = 33651840. Its totient is φ = 11777472.

The previous prime is 21347267. The next prime is 21347297. The reversal of 21347277 is 77274312.

It is not a de Polignac number, because 21347277 - 2⁶ = 21347213 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21347267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16918 + ... + 18135.

It is an arithmetic number, because the mean of its divisors is an integer number (2103240).

Almost surely, 2^21347277 is an apocalyptic number.

It is an amenable number.

21347277 is a deficient number, since it is larger than the sum of its proper divisors (12304563).

21347277 is a wasteful number, since it uses less digits than its factorization.

21347277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35092.

The product of its digits is 16464, while the sum is 33.

The square root of 21347277 is about 4620.3113531449. The cubic root of 21347277 is about 277.4049215708.

The spelling of 21347277 in words is "twenty-one million, three hundred forty-seven thousand, two hundred seventy-seven".