20287935648 has 96 divisors (see below), whose sum is σ = 59922374400. Its totient is φ = 6677019648.

The previous prime is 20287935607. The next prime is 20287935697. The reversal of 20287935648 is 84653978202.

20287935648 is a `hidden beast` number, since 2 + 0 + 2 + 8 + 79 + 3 + 564 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 20287935594 and 20287935603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80361 + ... + 216872.

It is an arithmetic number, because the mean of its divisors is an integer number (624191400).

Almost surely, 2^20287935648 is an apocalyptic number.

It is an amenable number.

20287935648 is an abundant number, since it is smaller than the sum of its proper divisors (39634438752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20287935648 is a wasteful number, since it uses less digits than its factorization.

20287935648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297331 (or 297317 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 20287935648 in words is "twenty billion, two hundred eighty-seven million, nine hundred thirty-five thousand, six hundred forty-eight".