21094058 has 4 divisors (see below), whose sum is σ = 31641090. Its totient is φ = 10547028.

The previous prime is 21094057. The next prime is 21094061. The reversal of 21094058 is 85049012.

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., 19598329 + 1495729 = 4427^2 + 1223^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21094058.

It is not an unprimeable number, because it can be changed into a prime (21094057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5273513 + ... + 5273516.

Almost surely, 2^21094058 is an apocalyptic number.

21094058 is a deficient number, since it is larger than the sum of its proper divisors (10547032).

21094058 is a wasteful number, since it uses less digits than its factorization.

21094058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10547031.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21094058 is about 4592.8267983890. The cubic root of 21094058 is about 276.3037071994.

The spelling of 21094058 in words is "twenty-one million, ninety-four thousand, fifty-eight".