20534236 has 6 divisors (see below), whose sum is σ = 35934920. Its totient is φ = 10267116.

The previous prime is 20534207. The next prime is 20534237. The reversal of 20534236 is 63243502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20534236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2566776 + ... + 2566783.

Almost surely, 2^20534236 is an apocalyptic number.

It is an amenable number.

20534236 is a deficient number, since it is larger than the sum of its proper divisors (15400684).

20534236 is a wasteful number, since it uses less digits than its factorization.

20534236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133563 (or 5133561 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 20534236 is about 4531.4717256097. The cubic root of 20534236 is about 273.8374548737.

Adding to 20534236 its reverse (63243502), we get a palindrome (83777738).

The spelling of 20534236 in words is "twenty million, five hundred thirty-four thousand, two hundred thirty-six".