20203434 has 24 divisors (see below), whose sum is σ = 44211492. Its totient is φ = 6667200.

The previous prime is 20203427. The next prime is 20203457. The reversal of 20203434 is 43430202.

It can be written as a sum of positive squares in 2 ways, for example, as 20115225 + 88209 = 4485^2 + 297^2 .

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

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3739 + ... + 7374.

Almost surely, 2^20203434 is an apocalyptic number.

20203434 is an abundant number, since it is smaller than the sum of its proper divisors (24008058).

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

20203434 is a wasteful number, since it uses less digits than its factorization.

20203434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11222 (or 11219 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20203434 is about 4494.8230221000. The cubic root of 20203434 is about 272.3590000846.

Adding to 20203434 its reverse (43430202), we get a palindrome (63633636).

The spelling of 20203434 in words is "twenty million, two hundred three thousand, four hundred thirty-four".