20133512 has 24 divisors (see below), whose sum is σ = 43914510. Its totient is φ = 8628480.

The previous prime is 20133497. The next prime is 20133517. The reversal of 20133512 is 21533102.

20133512 = 624² + 625² + ... + 671².

It can be written as a sum of positive squares in only one way, i.e., 19945156 + 188356 = 4466^2 + 434^2 .

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20133517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25289 + ... + 26072.

Almost surely, 2^20133512 is an apocalyptic number.

It is an amenable number.

20133512 is an abundant number, since it is smaller than the sum of its proper divisors (23780998).

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

20133512 is a wasteful number, since it uses less digits than its factorization.

20133512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51381 (or 51370 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 20133512 is about 4487.0382213661. The cubic root of 20133512 is about 272.0444347821.

Adding to 20133512 its reverse (21533102), we get a palindrome (41666614).

The spelling of 20133512 in words is "twenty million, one hundred thirty-three thousand, five hundred twelve".