21337071613 has 8 divisors (see below), whose sum is σ = 25067329056. Its totient is φ = 17905234800.

The previous prime is 21337071601. The next prime is 21337071619. The reversal of 21337071613 is 31617073312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21337071613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21337071619) 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, 74605003 + ... + 74605288.

It is an arithmetic number, because the mean of its divisors is an integer number (3133416132).

Almost surely, 2^21337071613 is an apocalyptic number.

It is an amenable number.

21337071613 is a deficient number, since it is larger than the sum of its proper divisors (3730257443).

21337071613 is a wasteful number, since it uses less digits than its factorization.

21337071613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149210315.

The product of its (nonzero) digits is 15876, while the sum is 34.

The spelling of 21337071613 in words is "twenty-one billion, three hundred thirty-seven million, seventy-one thousand, six hundred thirteen".