20934472 has 32 divisors (see below), whose sum is σ = 42711480. Its totient is φ = 9561600.

The previous prime is 20934469. The next prime is 20934481. The reversal of 20934472 is 27443902.

It can be written as a sum of positive squares in 4 ways, for example, as 20304036 + 630436 = 4506^2 + 794^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9508 + ... + 11500.

Almost surely, 2^20934472 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 20934472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21355740).

20934472 is an abundant number, since it is smaller than the sum of its proper divisors (21777008).

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

20934472 is a wasteful number, since it uses less digits than its factorization.

20934472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 20934472 is about 4575.4204178414. The cubic root of 20934472 is about 275.6051554932.

The spelling of 20934472 in words is "twenty million, nine hundred thirty-four thousand, four hundred seventy-two".