20934936 has 144 divisors (see below), whose sum is σ = 65356200. Its totient is φ = 6272640.

The previous prime is 20934931. The next prime is 20934943. The reversal of 20934936 is 63943902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20934936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 235180 + ... + 235268.

Almost surely, 2^20934936 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 20934936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32678100).

20934936 is an abundant number, since it is smaller than the sum of its proper divisors (44421264).

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

20934936 is a wasteful number, since it uses less digits than its factorization.

20934936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20934936 is about 4575.4711232834. The cubic root of 20934936 is about 275.6071916857.

The spelling of 20934936 in words is "twenty million, nine hundred thirty-four thousand, nine hundred thirty-six".