20558940193 has 8 divisors (see below), whose sum is σ = 22435298496. Its totient is φ = 18683809200.

The previous prime is 20558940137. The next prime is 20558940223. The reversal of 20558940193 is 39104985502.

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-20558940193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20558940133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271621 + ... + 338962.

It is an arithmetic number, because the mean of its divisors is an integer number (2804412312).

Almost surely, 2^20558940193 is an apocalyptic number.

It is an amenable number.

20558940193 is a deficient number, since it is larger than the sum of its proper divisors (1876358303).

20558940193 is a wasteful number, since it uses less digits than its factorization.

20558940193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613655.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 20558940193 in words is "twenty billion, five hundred fifty-eight million, nine hundred forty thousand, one hundred ninety-three".