21134321403402 has 16 divisors (see below), whose sum is σ = 42275501333280. Its totient is φ = 7043630713392.

The previous prime is 21134321403347. The next prime is 21134321403451. The reversal of 21134321403402 is 20430412343112.

It is a self number, because there is not a number n which added to its sum of digits gives 21134321403402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285731877 + ... + 285805832.

It is an arithmetic number, because the mean of its divisors is an integer number (2642218833330).

Almost surely, 2^{21134321403402} is an apocalyptic number.

21134321403402 is an abundant number, since it is smaller than the sum of its proper divisors (21141179929878).

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

21134321403402 is a wasteful number, since it uses less digits than its factorization.

21134321403402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571543877.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 21134321403402 its reverse (20430412343112), we get a palindrome (41564733746514).

The spelling of 21134321403402 in words is "twenty-one trillion, one hundred thirty-four billion, three hundred twenty-one million, four hundred three thousand, four hundred two".