21555013314 has 16 divisors (see below), whose sum is σ = 43816749120. Its totient is φ = 7067217360.

The previous prime is 21555013301. The next prime is 21555013321. The reversal of 21555013314 is 41331055512.

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, 29446374 + ... + 29447105.

It is an arithmetic number, because the mean of its divisors is an integer number (2738546820).

Almost surely, 2^21555013314 is an apocalyptic number.

21555013314 is an abundant number, since it is smaller than the sum of its proper divisors (22261735806).

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

21555013314 is a wasteful number, since it uses less digits than its factorization.

21555013314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58893545.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 21555013314 its reverse (41331055512), we get a palindrome (62886068826).

The spelling of 21555013314 in words is "twenty-one billion, five hundred fifty-five million, thirteen thousand, three hundred fourteen".