21340045463237 has 8 divisors (see below), whose sum is σ = 22379772393600. Its totient is φ = 20309643438480.

The previous prime is 21340045463183. The next prime is 21340045463251. The reversal of 21340045463237 is 73236454004312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21340045463237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21340045463257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2331221714 + ... + 2331230867.

It is an arithmetic number, because the mean of its divisors is an integer number (2797471549200).

Almost surely, 2^{21340045463237} is an apocalyptic number.

It is an amenable number.

21340045463237 is a deficient number, since it is larger than the sum of its proper divisors (1039726930363).

21340045463237 is a wasteful number, since it uses less digits than its factorization.

21340045463237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662452803.

The product of its (nonzero) digits is 1451520, while the sum is 44.

Adding to 21340045463237 its reverse (73236454004312), we get a palindrome (94576499467549).

The spelling of 21340045463237 in words is "twenty-one trillion, three hundred forty billion, forty-five million, four hundred sixty-three thousand, two hundred thirty-seven".