20535552 has 72 divisors (see below), whose sum is σ = 60747680. Its totient is φ = 6842880.

The previous prime is 20535551. The next prime is 20535583. The reversal of 20535552 is 25553502.

It is a tau number, because it is divible by the number of its divisors (72).

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 (20535551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5427 + ... + 8397.

Almost surely, 2^20535552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20535552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30373840).

20535552 is an abundant number, since it is smaller than the sum of its proper divisors (40212128).

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

20535552 is an equidigital number, since it uses as much as digits as its factorization.

20535552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 2976 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 20535552 is about 4531.6169299710. The cubic root of 20535552 is about 273.8433046554.

The spelling of 20535552 in words is "twenty million, five hundred thirty-five thousand, five hundred fifty-two".