15852020 has 12 divisors (see below), whose sum is σ = 33289284. Its totient is φ = 6340800.

The previous prime is 15851989. The next prime is 15852029. The reversal of 15852020 is 2025851.

It can be written as a sum of positive squares in 2 ways, for example, as 1669264 + 14182756 = 1292^2 + 3766^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15852029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396281 + ... + 396320.

It is an arithmetic number, because the mean of its divisors is an integer number (2774107).

Almost surely, 2^15852020 is an apocalyptic number.

15852020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15852020 is an abundant number, since it is smaller than the sum of its proper divisors (17437264).

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

15852020 is a wasteful number, since it uses less digits than its factorization.

15852020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792610 (or 792608 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 15852020 is about 3981.4595313779. The cubic root of 15852020 is about 251.2049563237.

Adding to 15852020 its reverse (2025851), we get a palindrome (17877871).

The spelling of 15852020 in words is "fifteen million, eight hundred fifty-two thousand, twenty".