21714205765 has 32 divisors (see below), whose sum is σ = 31440165120. Its totient is φ = 14064067584.

The previous prime is 21714205763. The next prime is 21714205789. The reversal of 21714205765 is 56750241712.

It is not a de Polignac number, because 21714205765 - 2¹ = 21714205763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21714205763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175659 + ... + 272551.

It is an arithmetic number, because the mean of its divisors is an integer number (982505160).

Almost surely, 2^21714205765 is an apocalyptic number.

It is an amenable number.

21714205765 is a deficient number, since it is larger than the sum of its proper divisors (9725959355).

21714205765 is a wasteful number, since it uses less digits than its factorization.

21714205765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97261.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 21714205765 in words is "twenty-one billion, seven hundred fourteen million, two hundred five thousand, seven hundred sixty-five".