20312513005 has 8 divisors (see below), whose sum is σ = 25161306624. Its totient is φ = 15725816400.

The previous prime is 20312513003. The next prime is 20312513017. The reversal of 20312513005 is 50031521302.

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

It is not a de Polignac number, because 20312513005 - 2¹ = 20312513003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20312513003) 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, 65524081 + ... + 65524390.

It is an arithmetic number, because the mean of its divisors is an integer number (3145163328).

Almost surely, 2^20312513005 is an apocalyptic number.

It is an amenable number.

20312513005 is a deficient number, since it is larger than the sum of its proper divisors (4848793619).

20312513005 is a wasteful number, since it uses less digits than its factorization.

20312513005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131048507.

The product of its (nonzero) digits is 900, while the sum is 22.

The spelling of 20312513005 in words is "twenty billion, three hundred twelve million, five hundred thirteen thousand, five".