20930858 has 8 divisors (see below), whose sum is σ = 33811428. Its totient is φ = 9660384.

The previous prime is 20930849. The next prime is 20930879. The reversal of 20930858 is 85803902.

It can be written as a sum of positive squares in 2 ways, for example, as 20097289 + 833569 = 4483^2 + 913^2 .

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

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 in 3 ways as a sum of consecutive naturals, for example, 402491 + ... + 402542.

Almost surely, 2^20930858 is an apocalyptic number.

20930858 is a deficient number, since it is larger than the sum of its proper divisors (12880570).

20930858 is a wasteful number, since it uses less digits than its factorization.

20930858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805048.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 20930858 is about 4575.0254644100. The cubic root of 20930858 is about 275.5892949809.

The spelling of 20930858 in words is "twenty million, nine hundred thirty thousand, eight hundred fifty-eight".