20004398 has 4 divisors (see below), whose sum is σ = 30006600. Its totient is φ = 10002198.

The previous prime is 20004367. The next prime is 20004419. The reversal of 20004398 is 89340002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001098 + ... + 5001101.

It is an arithmetic number, because the mean of its divisors is an integer number (7501650).

Almost surely, 2^20004398 is an apocalyptic number.

20004398 is a deficient number, since it is larger than the sum of its proper divisors (10002202).

20004398 is a wasteful number, since it uses less digits than its factorization.

20004398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002201.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 20004398 is about 4472.6276393190. The cubic root of 20004398 is about 271.4616568824.

It can be divided in two parts, 20004 and 398, that added together give a palindrome (20402).

The spelling of 20004398 in words is "twenty million, four thousand, three hundred ninety-eight".