21376071537 has 8 divisors (see below), whose sum is σ = 28549012800. Its totient is φ = 14226922320.

The previous prime is 21376071517. The next prime is 21376071569. The reversal of 21376071537 is 73517067312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21376071537 - 2¹² = 21376067441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21376071517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5945914 + ... + 5949507.

It is an arithmetic number, because the mean of its divisors is an integer number (3568626600).

Almost surely, 2^21376071537 is an apocalyptic number.

It is an amenable number.

21376071537 is a deficient number, since it is larger than the sum of its proper divisors (7172941263).

21376071537 is a wasteful number, since it uses less digits than its factorization.

21376071537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11896023.

The product of its (nonzero) digits is 185220, while the sum is 42.

The spelling of 21376071537 in words is "twenty-one billion, three hundred seventy-six million, seventy-one thousand, five hundred thirty-seven".