20287904115 has 16 divisors (see below), whose sum is σ = 32522963616. Its totient is φ = 10799443200.

The previous prime is 20287904069. The next prime is 20287904137. The reversal of 20287904115 is 51140978202.

It is not a de Polignac number, because 20287904115 - 2¹⁷ = 20287773043 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1290196 + ... + 1305825.

It is an arithmetic number, because the mean of its divisors is an integer number (2032685226).

Almost surely, 2^20287904115 is an apocalyptic number.

20287904115 is a deficient number, since it is larger than the sum of its proper divisors (12235059501).

20287904115 is a wasteful number, since it uses less digits than its factorization.

20287904115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596550.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 20287904115 in words is "twenty billion, two hundred eighty-seven million, nine hundred four thousand, one hundred fifteen".