20683741 has 6 divisors (see below), whose sum is σ = 22397370. Its totient is φ = 19092528.

The previous prime is 20683717. The next prime is 20683763. The reversal of 20683741 is 14738602.

It can be written as a sum of positive squares in 3 ways, for example, as 1058841 + 19624900 = 1029^2 + 4430^2 .

It is not a de Polignac number, because 20683741 - 2⁵ = 20683709 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 (20683241) 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 5 ways as a sum of consecutive naturals, for example, 61026 + ... + 61363.

It is an arithmetic number, because the mean of its divisors is an integer number (3732895).

Almost surely, 2^20683741 is an apocalyptic number.

It is an amenable number.

20683741 is a deficient number, since it is larger than the sum of its proper divisors (1713629).

20683741 is a wasteful number, since it uses less digits than its factorization.

20683741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122415 (or 122402 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20683741 is about 4547.9381042402. The cubic root of 20683741 is about 274.5004307654.

The spelling of 20683741 in words is "twenty million, six hundred eighty-three thousand, seven hundred forty-one".