21451442110434 has 48 divisors (see below), whose sum is σ = 55452707503200. Its totient is φ = 6128983459368.

The previous prime is 21451442110367. The next prime is 21451442110481. The reversal of 21451442110434 is 43401124415412.

21451442110434 is a `hidden beast` number, since 2 + 1 + 4 + 5 + 1 + 4 + 4 + 211 + 0 + 434 = 666.

It is a super-2 number, since 2×21451442110434² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4053557844 + ... + 4053563135.

It is an arithmetic number, because the mean of its divisors is an integer number (1155264739650).

Almost surely, 2^{21451442110434} is an apocalyptic number.

21451442110434 is an abundant number, since it is smaller than the sum of its proper divisors (34001265392766).

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

21451442110434 is a wasteful number, since it uses less digits than its factorization.

21451442110434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107121004 (or 8107120991 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

Adding to 21451442110434 its reverse (43401124415412), we get a palindrome (64852566525846).

The spelling of 21451442110434 in words is "twenty-one trillion, four hundred fifty-one billion, four hundred forty-two million, one hundred ten thousand, four hundred thirty-four".