20512161431615 has 96 divisors (see below), whose sum is σ = 29964556177920. Its totient is φ = 13188780993024.

The previous prime is 20512161431599. The next prime is 20512161431621. The reversal of 20512161431615 is 51613416121502.

It is not a de Polignac number, because 20512161431615 - 2⁴ = 20512161431599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 760062152 + ... + 760089138.

It is an arithmetic number, because the mean of its divisors is an integer number (312130793520).

Almost surely, 2^{20512161431615} is an apocalyptic number.

20512161431615 is a deficient number, since it is larger than the sum of its proper divisors (9452394746305).

20512161431615 is a wasteful number, since it uses less digits than its factorization.

20512161431615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27649 (or 27612 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 20512161431615 in words is "twenty trillion, five hundred twelve billion, one hundred sixty-one million, four hundred thirty-one thousand, six hundred fifteen".