20203012989 has 6 divisors (see below), whose sum is σ = 29182129886. Its totient is φ = 13468675320.

The previous prime is 20203012981. The next prime is 20203012997. The reversal of 20203012989 is 98921030202.

It is an interprime number because it is at equal distance from previous prime (20203012981) and next prime (20203012997).

It can be written as a sum of positive squares in only one way, i.e., 11590244964 + 8612768025 = 107658^2 + 92805^2 .

It is not a de Polignac number, because 20203012989 - 2³ = 20203012981 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 (20203012981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122389602 + ... + 1122389619.

Almost surely, 2^20203012989 is an apocalyptic number.

It is an amenable number.

20203012989 is a deficient number, since it is larger than the sum of its proper divisors (8979116897).

20203012989 is a wasteful number, since it uses less digits than its factorization.

20203012989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244779227 (or 2244779224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 20203012989 in words is "twenty billion, two hundred three million, twelve thousand, nine hundred eighty-nine".