15552020 has 48 divisors (see below), whose sum is σ = 35900928. Its totient is φ = 5612160.

The previous prime is 15552001. The next prime is 15552037. The reversal of 15552020 is 2025551.

15552020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 15551983 and 15552001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48902 + ... + 49218.

It is an arithmetic number, because the mean of its divisors is an integer number (747936).

Almost surely, 2^15552020 is an apocalyptic number.

15552020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15552020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17950464).

15552020 is an abundant number, since it is smaller than the sum of its proper divisors (20348908).

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

15552020 is a wasteful number, since it uses less digits than its factorization.

15552020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 15552020 is about 3943.6049497890. The cubic root of 15552020 is about 249.6101657664.

Adding to 15552020 its reverse (2025551), we get a palindrome (17577571).

The spelling of 15552020 in words is "fifteen million, five hundred fifty-two thousand, twenty".