20516477115 has 64 divisors (see below), whose sum is σ = 36686476800. Its totient is φ = 9729828864.

The previous prime is 20516477057. The next prime is 20516477117. The reversal of 20516477115 is 51177461502.

It is not a de Polignac number, because 20516477115 - 2⁷ = 20516476987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20516477117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1830669 + ... + 1841841.

It is an arithmetic number, because the mean of its divisors is an integer number (573226200).

Almost surely, 2^20516477115 is an apocalyptic number.

20516477115 is a deficient number, since it is larger than the sum of its proper divisors (16169999685).

20516477115 is a wasteful number, since it uses less digits than its factorization.

20516477115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11596.

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 20516477115 in words is "twenty billion, five hundred sixteen million, four hundred seventy-seven thousand, one hundred fifteen".