20934424 has 48 divisors (see below), whose sum is σ = 46472400. Its totient is φ = 8660160.

The previous prime is 20934401. The next prime is 20934437. The reversal of 20934424 is 42443902.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20934392 and 20934401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53622 + ... + 54010.

It is an arithmetic number, because the mean of its divisors is an integer number (968175).

Almost surely, 2^20934424 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 20934424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23236200).

20934424 is an abundant number, since it is smaller than the sum of its proper divisors (25537976).

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

20934424 is a wasteful number, since it uses less digits than its factorization.

20934424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20934424 is about 4575.4151724188. The cubic root of 20934424 is about 275.6049448509.

The spelling of 20934424 in words is "twenty million, nine hundred thirty-four thousand, four hundred twenty-four".