21246327 has 8 divisors (see below), whose sum is σ = 31476080. Its totient is φ = 14164200.

The previous prime is 21246317. The next prime is 21246341. The reversal of 21246327 is 72364212.

21246327 is a `hidden beast` number, since 2 + 1 + 24 + 632 + 7 = 666.

It is not a de Polignac number, because 21246327 - 2⁶ = 21246263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 786901 = 21246327 / (2 + 1 + 2 + 4 + 6 + 3 + 2 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21246327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21246307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393424 + ... + 393477.

It is an arithmetic number, because the mean of its divisors is an integer number (3934510).

Almost surely, 2^21246327 is an apocalyptic number.

21246327 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21246327 is a deficient number, since it is larger than the sum of its proper divisors (10229753).

21246327 is an equidigital number, since it uses as much as digits as its factorization.

21246327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786910 (or 786904 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 21246327 is about 4609.3738186439. The cubic root of 21246327 is about 276.9669533576.

The spelling of 21246327 in words is "twenty-one million, two hundred forty-six thousand, three hundred twenty-seven".