21140756395 has 24 divisors (see below), whose sum is σ = 28357504560. Its totient is φ = 15114475200.

The previous prime is 21140756393. The next prime is 21140756431. The reversal of 21140756395 is 59365704112.

It is not a de Polignac number, because 21140756395 - 2¹ = 21140756393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21140756393) 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, 260436 + ... + 331825.

It is an arithmetic number, because the mean of its divisors is an integer number (1181562690).

Almost surely, 2^21140756395 is an apocalyptic number.

21140756395 is a deficient number, since it is larger than the sum of its proper divisors (7216748165).

21140756395 is a wasteful number, since it uses less digits than its factorization.

21140756395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592347 (or 592336 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 21140756395 in words is "twenty-one billion, one hundred forty million, seven hundred fifty-six thousand, three hundred ninety-five".