21046941 has 6 divisors (see below), whose sum is σ = 30401150. Its totient is φ = 14031288.

The previous prime is 21046939. The next prime is 21046951. The reversal of 21046941 is 14964012.

It can be written as a sum of positive squares in only one way, i.e., 20738916 + 308025 = 4554^2 + 555^2 .

It is not a de Polignac number, because 21046941 - 2¹ = 21046939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1169266 + ... + 1169283.

Almost surely, 2^21046941 is an apocalyptic number.

It is an amenable number.

21046941 is a deficient number, since it is larger than the sum of its proper divisors (9354209).

21046941 is a wasteful number, since it uses less digits than its factorization.

21046941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338555 (or 2338552 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21046941 is about 4587.6945190368. The cubic root of 21046941 is about 276.0978307883.

It can be divided in two parts, 2104 and 6941, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 21046941 in words is "twenty-one million, forty-six thousand, nine hundred forty-one".