21271348 has 12 divisors (see below), whose sum is σ = 42542752. Its totient is φ = 9116280.

The previous prime is 21271339. The next prime is 21271351. The reversal of 21271348 is 84317212.

21271348 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 759691 = 21271348 / (2 + 1 + 2 + 7 + 1 + 3 + 4 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379818 + ... + 379873.

Almost surely, 2^21271348 is an apocalyptic number.

21271348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21271348 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21271348 is a wasteful number, since it uses less digits than its factorization.

21271348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759702 (or 759700 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 21271348 is about 4612.0871630966. The cubic root of 21271348 is about 277.0756352256.

The spelling of 21271348 in words is "twenty-one million, two hundred seventy-one thousand, three hundred forty-eight".