21610058 has 4 divisors (see below), whose sum is σ = 32415090. Its totient is φ = 10805028.

The previous prime is 21610027. The next prime is 21610067. The reversal of 21610058 is 85001612.

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., 19123129 + 2486929 = 4373^2 + 1577^2 .

It is an unprimeable number.

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, 5402513 + ... + 5402516.

Almost surely, 2^21610058 is an apocalyptic number.

21610058 is a deficient number, since it is larger than the sum of its proper divisors (10805032).

21610058 is a wasteful number, since it uses less digits than its factorization.

21610058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805031.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 21610058 is about 4648.6619580262. The cubic root of 21610058 is about 278.5385502539.

The spelling of 21610058 in words is "twenty-one million, six hundred ten thousand, fifty-eight".