21109058 has 8 divisors (see below), whose sum is σ = 32045328. Its totient is φ = 10427284.

The previous prime is 21109007. The next prime is 21109061. The reversal of 21109058 is 85090112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63416 + ... + 63747.

It is an arithmetic number, because the mean of its divisors is an integer number (4005666).

Almost surely, 2^21109058 is an apocalyptic number.

21109058 is a deficient number, since it is larger than the sum of its proper divisors (10936270).

21109058 is a wasteful number, since it uses less digits than its factorization.

21109058 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127248.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 21109058 is about 4594.4594894285. The cubic root of 21109058 is about 276.3691849372.

The spelling of 21109058 in words is "twenty-one million, one hundred nine thousand, fifty-eight".