20400334404 has 24 divisors (see below), whose sum is σ = 47920252800. Its totient is φ = 6754472544.

The previous prime is 20400334351. The next prime is 20400334411. The reversal of 20400334404 is 40443300402.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5703004 + ... + 5706579.

It is an arithmetic number, because the mean of its divisors is an integer number (1996677200).

Almost surely, 2^20400334404 is an apocalyptic number.

It is an amenable number.

20400334404 is an abundant number, since it is smaller than the sum of its proper divisors (27519918396).

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

20400334404 is a wasteful number, since it uses less digits than its factorization.

20400334404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11409739 (or 11409737 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20400334404 its reverse (40443300402), we get a palindrome (60843634806).

The spelling of 20400334404 in words is "twenty billion, four hundred million, three hundred thirty-four thousand, four hundred four".