21344131197 has 24 divisors (see below), whose sum is σ = 31528773120. Its totient is φ = 13907916000.

The previous prime is 21344131141. The next prime is 21344131201. The reversal of 21344131197 is 79113144312.

It is a happy number.

21344131197 is a `hidden beast` number, since 21 + 3 + 441 + 3 + 1 + 197 = 666.

It is not a de Polignac number, because 21344131197 - 2¹⁹ = 21343606909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344131117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284079 + ... + 351267.

It is an arithmetic number, because the mean of its divisors is an integer number (1313698880).

Almost surely, 2^21344131197 is an apocalyptic number.

It is an amenable number.

21344131197 is a deficient number, since it is larger than the sum of its proper divisors (10184641923).

21344131197 is a wasteful number, since it uses less digits than its factorization.

21344131197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67993 (or 67990 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The spelling of 21344131197 in words is "twenty-one billion, three hundred forty-four million, one hundred thirty-one thousand, one hundred ninety-seven".