21337127 has 16 divisors (see below), whose sum is σ = 25531200. Its totient is φ = 17445120.

The previous prime is 21337117. The next prime is 21337153. The reversal of 21337127 is 72173312.

It is not a de Polignac number, because 21337127 - 2¹⁰ = 21336103 is a prime.

It is a super-2 number, since 2×21337127² = 910545977228258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21337096 and 21337105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17477 + ... + 18657.

It is an arithmetic number, because the mean of its divisors is an integer number (1595700).

Almost surely, 2^21337127 is an apocalyptic number.

21337127 is a deficient number, since it is larger than the sum of its proper divisors (4194073).

21337127 is a wasteful number, since it uses less digits than its factorization.

21337127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306.

The product of its digits is 1764, while the sum is 26.

The square root of 21337127 is about 4619.2128117245. The cubic root of 21337127 is about 277.3609486506.

The spelling of 21337127 in words is "twenty-one million, three hundred thirty-seven thousand, one hundred twenty-seven".