21140332443 has 12 divisors (see below), whose sum is σ = 30730534848. Its totient is φ = 14003786160.

The previous prime is 21140332363. The next prime is 21140332453. The reversal of 21140332443 is 34423304112.

21140332443 is a `hidden beast` number, since 2 + 11 + 403 + 3 + 244 + 3 = 666.

It is not a de Polignac number, because 21140332443 - 2²⁴ = 21123555227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21140332453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7479243 + ... + 7482068.

It is an arithmetic number, because the mean of its divisors is an integer number (2560877904).

Almost surely, 2^21140332443 is an apocalyptic number.

21140332443 is a deficient number, since it is larger than the sum of its proper divisors (9590202405).

21140332443 is a wasteful number, since it uses less digits than its factorization.

21140332443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14961474 (or 14961471 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21140332443 its reverse (34423304112), we get a palindrome (55563636555).

The spelling of 21140332443 in words is "twenty-one billion, one hundred forty million, three hundred thirty-two thousand, four hundred forty-three".