20936941 has 4 divisors (see below), whose sum is σ = 20949084. Its totient is φ = 20924800.

The previous prime is 20936933. The next prime is 20936947. The reversal of 20936941 is 14963902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9947716 + 10989225 = 3154^2 + 3315^2 .

It is a cyclic number.

It is not a de Polignac number, because 20936941 - 2³ = 20936933 is a prime.

It is a super-3 number, since 3×20936941³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20936897 and 20936906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950 + ... + 7111.

It is an arithmetic number, because the mean of its divisors is an integer number (5237271).

Almost surely, 2^20936941 is an apocalyptic number.

It is an amenable number.

20936941 is a deficient number, since it is larger than the sum of its proper divisors (12143).

20936941 is a wasteful number, since it uses less digits than its factorization.

20936941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12142.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20936941 is about 4575.6902211579. The cubic root of 20936941 is about 275.6159899736.

The spelling of 20936941 in words is "twenty million, nine hundred thirty-six thousand, nine hundred forty-one".