21340898183641 has 3 divisors (see below), whose sum is σ = 21340902803263. Its totient is φ = 21340893564020.

The previous prime is 21340898183543. The next prime is 21340898183653. The reversal of 21340898183641 is 14638189804312.

The square root of 21340898183641 is 4619621.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 34365373641 + 21306532810000 = 185379^2 + 4615900^2 .

It is not a de Polignac number, because 21340898183641 - 2²³ = 21340889795033 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21340898183681) 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 2 ways as a sum of consecutive naturals, for example, 2309811 + ... + 6929431.

Almost surely, 2^{21340898183641} is an apocalyptic number.

21340898183641 is the 4619621-st square number.

21340898183641 is the 2309811-st centered octagonal number.

It is an amenable number.

21340898183641 is a deficient number, since it is larger than the sum of its proper divisors (4619622).

21340898183641 is an frugal number, since it uses more digits than its factorization.

21340898183641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239242 (or 4619621 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 58.

The spelling of 21340898183641 in words is "twenty-one trillion, three hundred forty billion, eight hundred ninety-eight million, one hundred eighty-three thousand, six hundred forty-one".