21325938 has 16 divisors (see below), whose sum is σ = 42925440. Its totient is φ = 7063056.

The previous prime is 21325919. The next prime is 21325943. The reversal of 21325938 is 83952312.

It is a junction number, because it is equal to n+sod(n) for n = 21325899 and 21325908.

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, 10378 + ... + 12261.

It is an arithmetic number, because the mean of its divisors is an integer number (2682840).

Almost surely, 2^21325938 is an apocalyptic number.

21325938 is an abundant number, since it is smaller than the sum of its proper divisors (21599502).

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

21325938 is a wasteful number, since it uses less digits than its factorization.

21325938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22801.

The product of its digits is 12960, while the sum is 33.

The square root of 21325938 is about 4618.0015158075. The cubic root of 21325938 is about 277.3124583005.

The spelling of 21325938 in words is "twenty-one million, three hundred twenty-five thousand, nine hundred thirty-eight".