21255205631614 has 8 divisors (see below), whose sum is σ = 31883400269568. Its totient is φ = 10627405541760.

The previous prime is 21255205631603. The next prime is 21255205631657. The reversal of 21255205631614 is 41613650255212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98502307 + ... + 98717854.

It is an arithmetic number, because the mean of its divisors is an integer number (3985425033696).

Almost surely, 2^{21255205631614} is an apocalyptic number.

21255205631614 is a deficient number, since it is larger than the sum of its proper divisors (10628194637954).

21255205631614 is a wasteful number, since it uses less digits than its factorization.

21255205631614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197274050.

The product of its (nonzero) digits is 432000, while the sum is 43.

Adding to 21255205631614 its reverse (41613650255212), we get a palindrome (62868855886826).

The spelling of 21255205631614 in words is "twenty-one trillion, two hundred fifty-five billion, two hundred five million, six hundred thirty-one thousand, six hundred fourteen".