20558914 has 4 divisors (see below), whose sum is σ = 30838374. Its totient is φ = 10279456.

The previous prime is 20558897. The next prime is 20558927. The reversal of 20558914 is 41985502.

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., 17918289 + 2640625 = 4233^2 + 1625^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20558914.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5139727 + ... + 5139730.

Almost surely, 2^20558914 is an apocalyptic number.

20558914 is a deficient number, since it is larger than the sum of its proper divisors (10279460).

20558914 is a wasteful number, since it uses less digits than its factorization.

20558914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10279459.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 20558914 is about 4534.1938644041. The cubic root of 20558914 is about 273.9471100428.

The spelling of 20558914 in words is "twenty million, five hundred fifty-eight thousand, nine hundred fourteen".