20974896 has 80 divisors (see below), whose sum is σ = 62853120. Its totient is φ = 6684480.

The previous prime is 20974883. The next prime is 20974901. The reversal of 20974896 is 69847902.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8881 + ... + 10991.

It is an arithmetic number, because the mean of its divisors is an integer number (785664).

Almost surely, 2^20974896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20974896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31426560).

20974896 is an abundant number, since it is smaller than the sum of its proper divisors (41878224).

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

20974896 is a wasteful number, since it uses less digits than its factorization.

20974896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 20974896 is about 4579.8358049170. The cubic root of 20974896 is about 275.7824372423.

The spelling of 20974896 in words is "twenty million, nine hundred seventy-four thousand, eight hundred ninety-six".