20533071 has 16 divisors (see below), whose sum is σ = 29715840. Its totient is φ = 12536160.

The previous prime is 20533063. The next prime is 20533109. The reversal of 20533071 is 17033502.

It is a happy number.

It is not a de Polignac number, because 20533071 - 2³ = 20533063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3100 + ... + 7118.

It is an arithmetic number, because the mean of its divisors is an integer number (1857240).

Almost surely, 2^20533071 is an apocalyptic number.

20533071 is a deficient number, since it is larger than the sum of its proper divisors (9182769).

20533071 is a wasteful number, since it uses less digits than its factorization.

20533071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 20533071 is about 4531.3431783523. The cubic root of 20533071 is about 273.8322760970.

Adding to 20533071 its reverse (17033502), we get a palindrome (37566573).

The spelling of 20533071 in words is "twenty million, five hundred thirty-three thousand, seventy-one".