19701082513 has 4 divisors (see below), whose sum is σ = 22515522880. Its totient is φ = 16886642148.

The previous prime is 19701082507. The next prime is 19701082537. The reversal of 19701082513 is 31528010791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31528010791 = 19 ⋅1659368989.

It is a cyclic number.

It is not a de Polignac number, because 19701082513 - 2⁵ = 19701082481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19701082013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407220173 + ... + 1407220186.

It is an arithmetic number, because the mean of its divisors is an integer number (5628880720).

Almost surely, 2^19701082513 is an apocalyptic number.

It is an amenable number.

19701082513 is a deficient number, since it is larger than the sum of its proper divisors (2814440367).

19701082513 is an equidigital number, since it uses as much as digits as its factorization.

19701082513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814440366.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 19701082513 in words is "nineteen billion, seven hundred one million, eighty-two thousand, five hundred thirteen".