20470858 has 8 divisors (see below), whose sum is σ = 30774852. Its totient is φ = 10212576.

The previous prime is 20470841. The next prime is 20470867. The reversal of 20470858 is 85807402.

It can be written as a sum of positive squares in 2 ways, for example, as 15705369 + 4765489 = 3963^2 + 2183^2 .

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10285 + ... + 12112.

Almost surely, 2^20470858 is an apocalyptic number.

20470858 is a deficient number, since it is larger than the sum of its proper divisors (10303994).

20470858 is a wasteful number, since it uses less digits than its factorization.

20470858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22856.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 20470858 is about 4524.4732290069. The cubic root of 20470858 is about 273.5554355132. Note that the first 3 decimals are identical.

The spelling of 20470858 in words is "twenty million, four hundred seventy thousand, eight hundred fifty-eight".