20036858 has 4 divisors (see below), whose sum is σ = 30055290. Its totient is φ = 10018428.

The previous prime is 20036851. The next prime is 20036879. The reversal of 20036858 is 85863002.

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., 17530969 + 2505889 = 4187^2 + 1583^2 .

It is not an unprimeable number, because it can be changed into a prime (20036851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5009213 + ... + 5009216.

Almost surely, 2^20036858 is an apocalyptic number.

20036858 is a deficient number, since it is larger than the sum of its proper divisors (10018432).

20036858 is a wasteful number, since it uses less digits than its factorization.

20036858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018431.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20036858 is about 4476.2549078443. The cubic root of 20036858 is about 271.6084060059.

The spelling of 20036858 in words is "twenty million, thirty-six thousand, eight hundred fifty-eight".