21748314 has 16 divisors (see below), whose sum is σ = 49710528. Its totient is φ = 6213792.

The previous prime is 21748313. The next prime is 21748333. The reversal of 21748314 is 41384712.

It is not an unprimeable number, because it can be changed into a prime (21748313) 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, 258867 + ... + 258950.

It is an arithmetic number, because the mean of its divisors is an integer number (3106908).

Almost surely, 2^21748314 is an apocalyptic number.

21748314 is an abundant number, since it is smaller than the sum of its proper divisors (27962214).

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

21748314 is a wasteful number, since it uses less digits than its factorization.

21748314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517829.

The product of its digits is 5376, while the sum is 30.

The square root of 21748314 is about 4663.5087648679. The cubic root of 21748314 is about 279.1312957142.

The spelling of 21748314 in words is "twenty-one million, seven hundred forty-eight thousand, three hundred fourteen".