20140512 has 192 divisors, whose sum is σ = 67060224. Its totient is φ = 5160960.

The previous prime is 20140493. The next prime is 20140559. The reversal of 20140512 is 21504102.

It is a junction number, because it is equal to n+sod(n) for n = 20140491 and 20140500.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 468363 + ... + 468405.

It is an arithmetic number, because the mean of its divisors is an integer number (349272).

Almost surely, 2^20140512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20140512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33530112).

20140512 is an abundant number, since it is smaller than the sum of its proper divisors (46919712).

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

20140512 is a wasteful number, since it uses less digits than its factorization.

20140512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 20140512 is about 4487.8181781351. The cubic root of 20140512 is about 272.0759591777.

Adding to 20140512 its reverse (21504102), we get a palindrome (41644614).

The spelling of 20140512 in words is "twenty million, one hundred forty thousand, five hundred twelve".