21325974 has 16 divisors (see below), whose sum is σ = 42697920. Its totient is φ = 7101000.

The previous prime is 21325957. The next prime is 21326017. The reversal of 21325974 is 47952312.

It is a super-3 number, since 3×21325974³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

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, 8349 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (2668620).

Almost surely, 2^21325974 is an apocalyptic number.

21325974 is an abundant number, since it is smaller than the sum of its proper divisors (21371946).

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

21325974 is a wasteful number, since it uses less digits than its factorization.

21325974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835.

The product of its digits is 15120, while the sum is 33.

The square root of 21325974 is about 4618.0054135958. The cubic root of 21325974 is about 277.3126143427.

The spelling of 21325974 in words is "twenty-one million, three hundred twenty-five thousand, nine hundred seventy-four".