20004434 has 16 divisors (see below), whose sum is σ = 31415040. Its totient is φ = 9535680.

The previous prime is 20004431. The next prime is 20004451. The reversal of 20004434 is 43440002.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20004431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19322 + ... + 20330.

It is an arithmetic number, because the mean of its divisors is an integer number (1963440).

Almost surely, 2^20004434 is an apocalyptic number.

20004434 is a deficient number, since it is larger than the sum of its proper divisors (11410606).

20004434 is a wasteful number, since it uses less digits than its factorization.

20004434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20004434 is about 4472.6316637971. The cubic root of 20004434 is about 271.4618197235.

Adding to 20004434 its reverse (43440002), we get a palindrome (63444436).

The spelling of 20004434 in words is "twenty million, four thousand, four hundred thirty-four".