21034342415206 has 32 divisors (see below), whose sum is σ = 34199689946400. Its totient is φ = 9663992572416.

The previous prime is 21034342415197. The next prime is 21034342415357. The reversal of 21034342415206 is 60251424343012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54720 + ... + 6486268.

It is an arithmetic number, because the mean of its divisors is an integer number (1068740310825).

Almost surely, 2^{21034342415206} is an apocalyptic number.

21034342415206 is a deficient number, since it is larger than the sum of its proper divisors (13165347531194).

21034342415206 is a wasteful number, since it uses less digits than its factorization.

21034342415206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433848.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 21034342415206 its reverse (60251424343012), we get a palindrome (81285766758218).

The spelling of 21034342415206 in words is "twenty-one trillion, thirty-four billion, three hundred forty-two million, four hundred fifteen thousand, two hundred six".