21102705209614 has 32 divisors (see below), whose sum is σ = 36861657370560. Its totient is φ = 8872646694912.

The previous prime is 21102705209491. The next prime is 21102705209633. The reversal of 21102705209614 is 41690250720112.

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, 7931182 + ... + 10252270.

It is an arithmetic number, because the mean of its divisors is an integer number (1151926792830).

Almost surely, 2^{21102705209614} is an apocalyptic number.

21102705209614 is a deficient number, since it is larger than the sum of its proper divisors (15758952160946).

21102705209614 is a wasteful number, since it uses less digits than its factorization.

21102705209614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333404.

The product of its (nonzero) digits is 60480, while the sum is 40.

Adding to 21102705209614 its reverse (41690250720112), we get a palindrome (62792955929726).

The spelling of 21102705209614 in words is "twenty-one trillion, one hundred two billion, seven hundred five million, two hundred nine thousand, six hundred fourteen".