20790958 has 4 divisors (see below), whose sum is σ = 31186440. Its totient is φ = 10395478.

The previous prime is 20790947. The next prime is 20791007. The reversal of 20790958 is 85909702.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 20790958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5197738 + ... + 5197741.

It is an arithmetic number, because the mean of its divisors is an integer number (7796610).

Almost surely, 2^20790958 is an apocalyptic number.

20790958 is a deficient number, since it is larger than the sum of its proper divisors (10395482).

20790958 is a wasteful number, since it uses less digits than its factorization.

20790958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395481.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 20790958 is about 4559.7102978150. The cubic root of 20790958 is about 274.9739170854.

The spelling of 20790958 in words is "twenty million, seven hundred ninety thousand, nine hundred fifty-eight".