21327246 has 32 divisors (see below), whose sum is σ = 47704320. Its totient is φ = 7062552.

The previous prime is 21327227. The next prime is 21327259. The reversal of 21327246 is 64272312.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7591 + ... + 10013.

It is an arithmetic number, because the mean of its divisors is an integer number (1490760).

Almost surely, 2^21327246 is an apocalyptic number.

21327246 is an abundant number, since it is smaller than the sum of its proper divisors (26377074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21327246 is a wasteful number, since it uses less digits than its factorization.

21327246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597 (or 2591 counting only the distinct ones).

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

The square root of 21327246 is about 4618.1431333383. The cubic root of 21327246 is about 277.3181277233.

Adding to 21327246 its reverse (64272312), we get a palindrome (85599558).

The spelling of 21327246 in words is "twenty-one million, three hundred twenty-seven thousand, two hundred forty-six".