21136058 has 4 divisors (see below), whose sum is σ = 31704090. Its totient is φ = 10568028.

The previous prime is 21136039. The next prime is 21136067. The reversal of 21136058 is 85063112.

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., 20912329 + 223729 = 4573^2 + 473^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5284013 + ... + 5284016.

Almost surely, 2^21136058 is an apocalyptic number.

21136058 is a deficient number, since it is larger than the sum of its proper divisors (10568032).

21136058 is a wasteful number, since it uses less digits than its factorization.

21136058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10568031.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 21136058 is about 4597.3968721441. The cubic root of 21136058 is about 276.4869667411.

The spelling of 21136058 in words is "twenty-one million, one hundred thirty-six thousand, fifty-eight".