20533012 has 24 divisors (see below), whose sum is σ = 36688680. Its totient is φ = 10053120.

The previous prime is 20533001. The next prime is 20533049. The reversal of 20533012 is 21033502.

It can be written as a sum of positive squares in 4 ways, for example, as 156816 + 20376196 = 396^2 + 4514^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48562 + ... + 48982.

It is an arithmetic number, because the mean of its divisors is an integer number (1528695).

Almost surely, 2^20533012 is an apocalyptic number.

It is an amenable number.

20533012 is a deficient number, since it is larger than the sum of its proper divisors (16155668).

20533012 is a wasteful number, since it uses less digits than its factorization.

20533012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20533012 is about 4531.3366681367. The cubic root of 20533012 is about 273.8320138190.

Adding to 20533012 its reverse (21033502), we get a palindrome (41566514).

The spelling of 20533012 in words is "twenty million, five hundred thirty-three thousand, twelve".