21007086313 has 8 divisors (see below), whose sum is σ = 21512433888. Its totient is φ = 20502502944.

The previous prime is 21007086281. The next prime is 21007086341. The reversal of 21007086313 is 31368070012.

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 21007086313 - 2⁵ = 21007086281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21007086343) 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, 135220 + ... + 245557.

It is an arithmetic number, because the mean of its divisors is an integer number (2689054236).

Almost surely, 2^21007086313 is an apocalyptic number.

It is an amenable number.

21007086313 is a deficient number, since it is larger than the sum of its proper divisors (505347575).

21007086313 is a wasteful number, since it uses less digits than its factorization.

21007086313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382103.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 21007086313 in words is "twenty-one billion, seven million, eighty-six thousand, three hundred thirteen".