15020321489 has 2 divisors, whose sum is σ = 15020321490. Its totient is φ = 15020321488.

The previous prime is 15020321453. The next prime is 15020321497. The reversal of 15020321489 is 98412302051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9984006400 + 5036315089 = 99920^2 + 70967^2 .

It is a cyclic number.

It is not a de Polignac number, because 15020321489 - 2²⁰ = 15019272913 is a prime.

It is a super-2 number, since 2×15020321489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15020321089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7510160744 + 7510160745.

It is an arithmetic number, because the mean of its divisors is an integer number (7510160745).

Almost surely, 2^15020321489 is an apocalyptic number.

It is an amenable number.

15020321489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15020321489 is an equidigital number, since it uses as much as digits as its factorization.

15020321489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 15020321489 in words is "fifteen billion, twenty million, three hundred twenty-one thousand, four hundred eighty-nine".