20812152 has 16 divisors (see below), whose sum is σ = 52030440. Its totient is φ = 6937376.

The previous prime is 20812147. The next prime is 20812153. The reversal of 20812152 is 25121802.

It is a happy number.

It is a super-2 number, since 2×20812152² = 866291341742208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812153) 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 3 ways as a sum of consecutive naturals, for example, 433563 + ... + 433610.

Almost surely, 2^20812152 is an apocalyptic number.

It is an amenable number.

20812152 is an abundant number, since it is smaller than the sum of its proper divisors (31218288).

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

20812152 is a wasteful number, since it uses less digits than its factorization.

20812152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867182 (or 867178 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20812152 is about 4562.0337569992. The cubic root of 20812152 is about 275.0673201578.

Adding to 20812152 its reverse (25121802), we get a palindrome (45933954).

The spelling of 20812152 in words is "twenty million, eight hundred twelve thousand, one hundred fifty-two".