20958193 has 8 divisors (see below), whose sum is σ = 21605760. Its totient is φ = 20319120.

The previous prime is 20958181. The next prime is 20958211. The reversal of 20958193 is 39185902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20958193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20958163) 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 7 ways as a sum of consecutive naturals, for example, 3078 + ... + 7168.

It is an arithmetic number, because the mean of its divisors is an integer number (2700720).

Almost surely, 2^20958193 is an apocalyptic number.

It is an amenable number.

20958193 is a deficient number, since it is larger than the sum of its proper divisors (647567).

20958193 is a wasteful number, since it uses less digits than its factorization.

20958193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 20958193 is about 4578.0119047464. The cubic root of 20958193 is about 275.7092129249.

The spelling of 20958193 in words is "twenty million, nine hundred fifty-eight thousand, one hundred ninety-three".