21134321403450 has 48 divisors (see below), whose sum is σ = 52427295658560. Its totient is φ = 5634294462720.

The previous prime is 21134321403347. The next prime is 21134321403451. The reversal of 21134321403450 is 5430412343112.

It is not an unprimeable number, because it can be changed into a prime (21134321403451) by changing a digit.

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, 18500830 + ... + 19609929.

It is an arithmetic number, because the mean of its divisors is an integer number (1092235326220).

Almost surely, 2^{21134321403450} is an apocalyptic number.

21134321403450 is an abundant number, since it is smaller than the sum of its proper divisors (31292974255110).

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

21134321403450 is a wasteful number, since it uses less digits than its factorization.

21134321403450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38114471 (or 38114466 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 21134321403450 its reverse (5430412343112), we get a palindrome (26564733746562).

The spelling of 21134321403450 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty-one million, four hundred three thousand, four hundred fifty".