20352546 has 40 divisors (see below), whose sum is σ = 46256364. Its totient is φ = 6687360.

The previous prime is 20352529. The next prime is 20352547. The reversal of 20352546 is 64525302.

It can be written as a sum of positive squares in 2 ways, for example, as 19847025 + 505521 = 4455^2 + 711^2 .

It is a super-2 number, since 2×20352546² = 828452257364232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20352547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10966 + ... + 12686.

Almost surely, 2^20352546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20352546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23128182).

20352546 is an abundant number, since it is smaller than the sum of its proper divisors (25903818).

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

20352546 is a wasteful number, since it uses less digits than its factorization.

20352546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 20352546 is about 4511.3796116044. The cubic root of 20352546 is about 273.0274093963.

Adding to 20352546 its reverse (64525302), we get a palindrome (84877848).

The spelling of 20352546 in words is "twenty million, three hundred fifty-two thousand, five hundred forty-six".