21313348 has 36 divisors (see below), whose sum is σ = 43521856. Its totient is φ = 8946000.

The previous prime is 21313343. The next prime is 21313349. The reversal of 21313348 is 84331312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313343) 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 11 ways as a sum of consecutive naturals, for example, 141073 + ... + 141223.

Almost surely, 2^21313348 is an apocalyptic number.

21313348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21313348 is an abundant number, since it is smaller than the sum of its proper divisors (22208508).

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

21313348 is a wasteful number, since it uses less digits than its factorization.

21313348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 231 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 21313348 is about 4616.6381707905. The cubic root of 21313348 is about 277.2578760803.

The spelling of 21313348 in words is "twenty-one million, three hundred thirteen thousand, three hundred forty-eight".