20503588389 has 16 divisors (see below), whose sum is σ = 28780006080. Its totient is φ = 12948266880.

The previous prime is 20503588379. The next prime is 20503588403. The reversal of 20503588389 is 98388530502.

It is not a de Polignac number, because 20503588389 - 2¹³ = 20503580197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20503588309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009159 + ... + 1029275.

It is an arithmetic number, because the mean of its divisors is an integer number (1798750380).

Almost surely, 2^20503588389 is an apocalyptic number.

It is an amenable number.

20503588389 is a deficient number, since it is larger than the sum of its proper divisors (8276417691).

20503588389 is a wasteful number, since it uses less digits than its factorization.

20503588389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38020.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 20503588389 in words is "twenty billion, five hundred three million, five hundred eighty-eight thousand, three hundred eighty-nine".