21340340001 has 16 divisors (see below), whose sum is σ = 31922267520. Its totient is φ = 14088766320.

The previous prime is 21340339967. The next prime is 21340340017. The reversal of 21340340001 is 10004304312.

It is a de Polignac number, because none of the positive numbers 2^k-21340340001 is a prime.

It is a super-2 number, since 2×21340340001² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21340340041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3834030 + ... + 3839591.

It is an arithmetic number, because the mean of its divisors is an integer number (1995141720).

Almost surely, 2^21340340001 is an apocalyptic number.

It is an amenable number.

21340340001 is a deficient number, since it is larger than the sum of its proper divisors (10581927519).

21340340001 is a wasteful number, since it uses less digits than its factorization.

21340340001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7673733 (or 7673727 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21340340001 its reverse (10004304312), we get a palindrome (31344644313).

The spelling of 21340340001 in words is "twenty-one billion, three hundred forty million, three hundred forty thousand, one".