21404104034 has 16 divisors (see below), whose sum is σ = 32570600256. Its totient is φ = 10547350800.

The previous prime is 21404104009. The next prime is 21404104049. The reversal of 21404104034 is 43040140412.

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, 370229 + ... + 424119.

It is an arithmetic number, because the mean of its divisors is an integer number (2035662516).

Almost surely, 2^21404104034 is an apocalyptic number.

21404104034 is a deficient number, since it is larger than the sum of its proper divisors (11166496222).

21404104034 is a wasteful number, since it uses less digits than its factorization.

21404104034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56761.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21404104034 its reverse (43040140412), we get a palindrome (64444244446).

The spelling of 21404104034 in words is "twenty-one billion, four hundred four million, one hundred four thousand, thirty-four".