20533011 has 8 divisors (see below), whose sum is σ = 27399120. Its totient is φ = 13677792.

The previous prime is 20533001. The next prime is 20533049. The reversal of 20533011 is 11033502.

It is a happy number.

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

It is not a de Polignac number, because 20533011 - 2¹⁸ = 20270867 is a prime.

It is a super-2 number, since 2×20533011² = 843209081452242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20533001) 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, 4185 + ... + 7653.

It is an arithmetic number, because the mean of its divisors is an integer number (3424890).

Almost surely, 2^20533011 is an apocalyptic number.

20533011 is a deficient number, since it is larger than the sum of its proper divisors (6866109).

20533011 is a wasteful number, since it uses less digits than its factorization.

20533011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5445.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 20533011 is about 4531.3365577940. The cubic root of 20533011 is about 273.8320093736.

Adding to 20533011 its reverse (11033502), we get a palindrome (31566513).

The spelling of 20533011 in words is "twenty million, five hundred thirty-three thousand, eleven".