20331568513 has 8 divisors (see below), whose sum is σ = 20566537632. Its totient is φ = 20097432096.

The previous prime is 20331568493. The next prime is 20331568529. The reversal of 20331568513 is 31586513302.

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 20331568513 - 2⁹ = 20331568001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331562513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158995 + ... + 256792.

It is an arithmetic number, because the mean of its divisors is an integer number (2570817204).

Almost surely, 2^20331568513 is an apocalyptic number.

It is an amenable number.

20331568513 is a deficient number, since it is larger than the sum of its proper divisors (234969119).

20331568513 is a wasteful number, since it uses less digits than its factorization.

20331568513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416351.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 20331568513 in words is "twenty billion, three hundred thirty-one million, five hundred sixty-eight thousand, five hundred thirteen".