21325704 has 32 divisors (see below), whose sum is σ = 53460000. Its totient is φ = 7089152.

The previous prime is 21325693. The next prime is 21325739. The reversal of 21325704 is 40752312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a plaindrome in base 16.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9787 + ... + 11765.

It is an arithmetic number, because the mean of its divisors is an integer number (1670625).

Almost surely, 2^21325704 is an apocalyptic number.

21325704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21325704 is an abundant number, since it is smaller than the sum of its proper divisors (32134296).

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

21325704 is a wasteful number, since it uses less digits than its factorization.

21325704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437 (or 2433 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 21325704 is about 4617.9761801031. The cubic root of 21325704 is about 277.3114440215.

The spelling of 21325704 in words is "twenty-one million, three hundred twenty-five thousand, seven hundred four".