20030436 has 24 divisors (see below), whose sum is σ = 51931040. Its totient is φ = 6676776.

The previous prime is 20030411. The next prime is 20030443. The reversal of 20030436 is 63403002.

20030436 is a `hidden beast` number, since 200 + 30 + 436 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92626 + ... + 92841.

Almost surely, 2^20030436 is an apocalyptic number.

It is an amenable number.

20030436 is an abundant number, since it is smaller than the sum of its proper divisors (31900604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20030436 is a wasteful number, since it uses less digits than its factorization.

20030436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185480 (or 185472 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20030436 is about 4475.5375096183. The cubic root of 20030436 is about 271.5793852289.

Adding to 20030436 its reverse (63403002), we get a palindrome (83433438).

The spelling of 20030436 in words is "twenty million, thirty thousand, four hundred thirty-six".