20400200204 has 12 divisors (see below), whose sum is σ = 35709585744. Its totient is φ = 10197461424.

The previous prime is 20400200203. The next prime is 20400200251. The reversal of 20400200204 is 40200200402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20400200201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642224 + ... + 673239.

It is an arithmetic number, because the mean of its divisors is an integer number (2975798812).

Almost surely, 2^20400200204 is an apocalyptic number.

It is an amenable number.

20400200204 is a deficient number, since it is larger than the sum of its proper divisors (15309385540).

20400200204 is a wasteful number, since it uses less digits than its factorization.

20400200204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319344 (or 1319342 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

Adding to 20400200204 its reverse (40200200402), we get a palindrome (60600400606).

The spelling of 20400200204 in words is "twenty billion, four hundred million, two hundred thousand, two hundred four".