21465327 has 16 divisors (see below), whose sum is σ = 31216640. Its totient is φ = 13040352.

The previous prime is 21465319. The next prime is 21465331. The reversal of 21465327 is 72356412.

It is not a de Polignac number, because 21465327 - 2³ = 21465319 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 21465294 and 21465303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21465397) 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, 403 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (1951040).

Almost surely, 2^21465327 is an apocalyptic number.

21465327 is a deficient number, since it is larger than the sum of its proper divisors (9751313).

21465327 is a wasteful number, since it uses less digits than its factorization.

21465327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062.

The product of its digits is 10080, while the sum is 30.

The square root of 21465327 is about 4633.0688533627. The cubic root of 21465327 is about 277.9153297000.

The spelling of 21465327 in words is "twenty-one million, four hundred sixty-five thousand, three hundred twenty-seven".