15530454020 has 12 divisors (see below), whose sum is σ = 32613953484. Its totient is φ = 6212181600.

The previous prime is 15530454011. The next prime is 15530454031. The reversal of 15530454020 is 2045403551.

It can be written as a sum of positive squares in 2 ways, for example, as 8398989316 + 7131464704 = 91646^2 + 84448^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388261331 + ... + 388261370.

It is an arithmetic number, because the mean of its divisors is an integer number (2717829457).

Almost surely, 2^15530454020 is an apocalyptic number.

15530454020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15530454020 is an abundant number, since it is smaller than the sum of its proper divisors (17083499464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15530454020 is a wasteful number, since it uses less digits than its factorization.

15530454020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776522710 (or 776522708 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 15530454020 its reverse (2045403551), we get a palindrome (17575857571).

It can be divided in two parts, 15 and 530454020, that added together give a palindrome (530454035).

The spelling of 15530454020 in words is "fifteen billion, five hundred thirty million, four hundred fifty-four thousand, twenty".