20958874 has 4 divisors (see below), whose sum is σ = 31438314. Its totient is φ = 10479436.

The previous prime is 20958863. The next prime is 20958907. The reversal of 20958874 is 47885902.

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

It can be written as a sum of positive squares in only one way, i.e., 12215025 + 8743849 = 3495^2 + 2957^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20958874.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5239717 + ... + 5239720.

Almost surely, 2^20958874 is an apocalyptic number.

20958874 is a deficient number, since it is larger than the sum of its proper divisors (10479440).

20958874 is a wasteful number, since it uses less digits than its factorization.

20958874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10479439.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 20958874 is about 4578.0862814062. The cubic root of 20958874 is about 275.7121991228.

The spelling of 20958874 in words is "twenty million, nine hundred fifty-eight thousand, eight hundred seventy-four".