20354943 has 12 divisors (see below), whose sum is σ = 31571160. Its totient is φ = 11631312.

The previous prime is 20354927. The next prime is 20354969. The reversal of 20354943 is 34945302.

It is not a de Polignac number, because 20354943 - 2⁴ = 20354927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20354943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354993) 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 11 ways as a sum of consecutive naturals, for example, 69088 + ... + 69381.

It is an arithmetic number, because the mean of its divisors is an integer number (2630930).

Almost surely, 2^20354943 is an apocalyptic number.

20354943 is a deficient number, since it is larger than the sum of its proper divisors (11216217).

20354943 is a wasteful number, since it uses less digits than its factorization.

20354943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138486 (or 138479 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 20354943 is about 4511.6452653106. The cubic root of 20354943 is about 273.0381274822.

The spelling of 20354943 in words is "twenty million, three hundred fifty-four thousand, nine hundred forty-three".