20006858 has 8 divisors (see below), whose sum is σ = 31775652. Its totient is φ = 9414976.

The previous prime is 20006851. The next prime is 20006869. The reversal of 20006858 is 85860002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15626209 + 4380649 = 3953^2 + 2093^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20006858.

It is not an unprimeable number, because it can be changed into a prime (20006851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294185 + ... + 294252.

Almost surely, 2^20006858 is an apocalyptic number.

20006858 is a deficient number, since it is larger than the sum of its proper divisors (11768794).

20006858 is a wasteful number, since it uses less digits than its factorization.

20006858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588456.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 20006858 is about 4472.9026369909. The cubic root of 20006858 is about 271.4727839073.

The spelling of 20006858 in words is "twenty million, six thousand, eight hundred fifty-eight".