20193943 has 16 divisors (see below), whose sum is σ = 26659584. Its totient is φ = 14808960.

The previous prime is 20193913. The next prime is 20193949. The reversal of 20193943 is 34939102.

It is a cyclic number.

It is not a de Polignac number, because 20193943 - 2¹³ = 20185751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20193949) 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 15 ways as a sum of consecutive naturals, for example, 6405 + ... + 9022.

It is an arithmetic number, because the mean of its divisors is an integer number (1666224).

Almost surely, 2^20193943 is an apocalyptic number.

20193943 is a deficient number, since it is larger than the sum of its proper divisors (6465641).

20193943 is a wasteful number, since it uses less digits than its factorization.

20193943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15462.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20193943 is about 4493.7671279229. The cubic root of 20193943 is about 272.3163445612.

The spelling of 20193943 in words is "twenty million, one hundred ninety-three thousand, nine hundred forty-three".