21314363565 has 48 divisors (see below), whose sum is σ = 38694394368. Its totient is φ = 10000848000.

The previous prime is 21314363561. The next prime is 21314363569. The reversal of 21314363565 is 56536341312.

It is an interprime number because it is at equal distance from previous prime (21314363561) and next prime (21314363569).

It is not a de Polignac number, because 21314363565 - 2² = 21314363561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314363561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133146 + ... + 245675.

It is an arithmetic number, because the mean of its divisors is an integer number (806133216).

Almost surely, 2^21314363565 is an apocalyptic number.

It is an amenable number.

21314363565 is a deficient number, since it is larger than the sum of its proper divisors (17380030803).

21314363565 is a wasteful number, since it uses less digits than its factorization.

21314363565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378882 (or 378871 counting only the distinct ones).

The product of its digits is 194400, while the sum is 39.

The spelling of 21314363565 in words is "twenty-one billion, three hundred fourteen million, three hundred sixty-three thousand, five hundred sixty-five".