20121532 has 12 divisors (see below), whose sum is σ = 37066120. Its totient is φ = 9531216.

The previous prime is 20121467. The next prime is 20121533. The reversal of 20121532 is 23512102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121533) 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, 132303 + ... + 132454.

Almost surely, 2^20121532 is an apocalyptic number.

It is an amenable number.

20121532 is a deficient number, since it is larger than the sum of its proper divisors (16944588).

20121532 is a wasteful number, since it uses less digits than its factorization.

20121532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264780 (or 264778 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20121532 is about 4485.7030664100. The cubic root of 20121532 is about 271.9904660730.

Adding to 20121532 its reverse (23512102), we get a palindrome (43633634).

The spelling of 20121532 in words is "twenty million, one hundred twenty-one thousand, five hundred thirty-two".