20958113 has 4 divisors (see below), whose sum is σ = 22863408. Its totient is φ = 19052820.

The previous prime is 20958107. The next prime is 20958151. The reversal of 20958113 is 31185902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20958113 - 2¹⁰ = 20957089 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 952631 + ... + 952652.

It is an arithmetic number, because the mean of its divisors is an integer number (5715852).

Almost surely, 2^20958113 is an apocalyptic number.

It is an amenable number.

20958113 is a deficient number, since it is larger than the sum of its proper divisors (1905295).

20958113 is a wasteful number, since it uses less digits than its factorization.

20958113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905294.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 20958113 is about 4578.0031673209. The cubic root of 20958113 is about 275.7088621191.

Subtracting from 20958113 its sum of digits (29), we obtain a square (20958084 = 4578²).

The spelling of 20958113 in words is "twenty million, nine hundred fifty-eight thousand, one hundred thirteen".