20936790 has 96 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 4732992.

The previous prime is 20936789. The next prime is 20936791. The reversal of 20936790 is 9763902.

20936790 is a `hidden beast` number, since 209 + 367 + 90 = 666.

It is an interprime number because it is at equal distance from previous prime (20936789) and next prime (20936791).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 105111 + ... + 105309.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^20936790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20936790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31449600).

20936790 is an abundant number, since it is smaller than the sum of its proper divisors (41962410).

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

20936790 is a wasteful number, since it uses less digits than its factorization.

20936790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 20936790 is about 4575.6737208853. The cubic root of 20936790 is about 275.6153273789.

The spelling of 20936790 in words is "twenty million, nine hundred thirty-six thousand, seven hundred ninety".