20587982089 has 8 divisors (see below), whose sum is σ = 20615663880. Its totient is φ = 20560320000.

The previous prime is 20587982053. The next prime is 20587982101. The reversal of 20587982089 is 98028978502.

It can be written as a sum of positive squares in 4 ways, for example, as 17036775625 + 3551206464 = 130525^2 + 59592^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20587982089 - 2²⁵ = 20554427657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20587382089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3739839 + ... + 3745339.

It is an arithmetic number, because the mean of its divisors is an integer number (2576957985).

Almost surely, 2^20587982089 is an apocalyptic number.

It is an amenable number.

20587982089 is a deficient number, since it is larger than the sum of its proper divisors (27681791).

20587982089 is a wasteful number, since it uses less digits than its factorization.

20587982089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 20587982089 in words is "twenty billion, five hundred eighty-seven million, nine hundred eighty-two thousand, eighty-nine".