21325748 has 12 divisors (see below), whose sum is σ = 37453920. Its totient is φ = 10624632.

The previous prime is 21325739. The next prime is 21325757. The reversal of 21325748 is 84752312.

It is an interprime number because it is at equal distance from previous prime (21325739) and next prime (21325757).

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 3 ways as a sum of consecutive naturals, for example, 8288 + ... + 10551.

It is an arithmetic number, because the mean of its divisors is an integer number (3121160).

Almost surely, 2^21325748 is an apocalyptic number.

It is an amenable number.

21325748 is a deficient number, since it is larger than the sum of its proper divisors (16128172).

21325748 is a wasteful number, since it uses less digits than its factorization.

21325748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19126 (or 19124 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 21325748 is about 4617.9809440923. The cubic root of 21325748 is about 277.3116347412.

The spelling of 21325748 in words is "twenty-one million, three hundred twenty-five thousand, seven hundred forty-eight".