20061533 has 8 divisors (see below), whose sum is σ = 20849400. Its totient is φ = 19280128.

The previous prime is 20061523. The next prime is 20061539. The reversal of 20061533 is 33516002.

It can be written as a sum of positive squares in 4 ways, for example, as 232324 + 19829209 = 482^2 + 4453^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20061533 - 2¹² = 20057437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20061539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5273 + ... + 8241.

It is an arithmetic number, because the mean of its divisors is an integer number (2606175).

Almost surely, 2^20061533 is an apocalyptic number.

It is an amenable number.

20061533 is a deficient number, since it is larger than the sum of its proper divisors (787867).

20061533 is a wasteful number, since it uses less digits than its factorization.

20061533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 20061533 is about 4479.0102701378. The cubic root of 20061533 is about 271.7198537555.

Adding to 20061533 its reverse (33516002), we get a palindrome (53577535).

The spelling of 20061533 in words is "twenty million, sixty-one thousand, five hundred thirty-three".