20436034 has 4 divisors (see below), whose sum is σ = 30654054. Its totient is φ = 10218016.

The previous prime is 20436019. The next prime is 20436041. The reversal of 20436034 is 43063402.

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., 15800625 + 4635409 = 3975^2 + 2153^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20435996 and 20436014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5109007 + ... + 5109010.

Almost surely, 2^20436034 is an apocalyptic number.

20436034 is a deficient number, since it is larger than the sum of its proper divisors (10218020).

20436034 is a wasteful number, since it uses less digits than its factorization.

20436034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10218019.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20436034 is about 4520.6231871281. The cubic root of 20436034 is about 273.4002278601.

Adding to 20436034 its reverse (43063402), we get a palindrome (63499436).

The spelling of 20436034 in words is "twenty million, four hundred thirty-six thousand, thirty-four".