21034404144 has 60 divisors (see below), whose sum is σ = 63395362576. Its totient is φ = 6472123776.

The previous prime is 21034404121. The next prime is 21034404169. The reversal of 21034404144 is 44140443012.

21034404144 is a `hidden beast` number, since 210 + 3 + 4 + 404 + 1 + 44 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5616292 + ... + 5620035.

Almost surely, 2^21034404144 is an apocalyptic number.

21034404144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21034404144 is an abundant number, since it is smaller than the sum of its proper divisors (42360958432).

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

21034404144 is a wasteful number, since it uses less digits than its factorization.

21034404144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11236354 (or 11236345 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21034404144 its reverse (44140443012), we get a palindrome (65174847156).

The spelling of 21034404144 in words is "twenty-one billion, thirty-four million, four hundred four thousand, one hundred forty-four".