20589445629 has 6 divisors (see below), whose sum is σ = 29740310366. Its totient is φ = 13726297080.

The previous prime is 20589445619. The next prime is 20589445633. The reversal of 20589445629 is 92654498502.

20589445629 is a `hidden beast` number, since 2 + 0 + 5 + 8 + 9 + 4 + 4 + 5 + 629 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17391543129 + 3197902500 = 131877^2 + 56550^2 .

It is not a de Polignac number, because 20589445629 - 2¹⁶ = 20589380093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589445619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1143858082 + ... + 1143858099.

Almost surely, 2^20589445629 is an apocalyptic number.

It is an amenable number.

20589445629 is a deficient number, since it is larger than the sum of its proper divisors (9150864737).

20589445629 is a wasteful number, since it uses less digits than its factorization.

20589445629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287716187 (or 2287716184 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 20589445629 in words is "twenty billion, five hundred eighty-nine million, four hundred forty-five thousand, six hundred twenty-nine".