20287761584 has 10 divisors (see below), whose sum is σ = 39307538100. Its totient is φ = 10143880784.

The previous prime is 20287761583. The next prime is 20287761617. The reversal of 20287761584 is 48516778202.

It is not an unprimeable number, because it can be changed into a prime (20287761581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633992534 + ... + 633992565.

It is an arithmetic number, because the mean of its divisors is an integer number (3930753810).

Almost surely, 2^20287761584 is an apocalyptic number.

It is an amenable number.

20287761584 is a deficient number, since it is larger than the sum of its proper divisors (19019776516).

20287761584 is a wasteful number, since it uses less digits than its factorization.

20287761584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267985107 (or 1267985101 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 20287761584 in words is "twenty billion, two hundred eighty-seven million, seven hundred sixty-one thousand, five hundred eighty-four".