21159496337 has 8 divisors (see below), whose sum is σ = 24286070016. Its totient is φ = 18058869792.

The previous prime is 21159496331. The next prime is 21159496339. The reversal of 21159496337 is 73369495112.

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

It is a cyclic number.

It is not a de Polignac number, because 21159496337 - 2⁸ = 21159496081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21159496331) 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, 6485033 + ... + 6488294.

It is an arithmetic number, because the mean of its divisors is an integer number (3035758752).

Almost surely, 2^21159496337 is an apocalyptic number.

It is an amenable number.

21159496337 is a deficient number, since it is larger than the sum of its proper divisors (3126573679).

21159496337 is a wasteful number, since it uses less digits than its factorization.

21159496337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12973567.

The product of its digits is 1224720, while the sum is 50.

The spelling of 21159496337 in words is "twenty-one billion, one hundred fifty-nine million, four hundred ninety-six thousand, three hundred thirty-seven".