20512746 has 24 divisors (see below), whose sum is σ = 44744544. Its totient is φ = 6791400.

The previous prime is 20512741. The next prime is 20512747. The reversal of 20512746 is 64721502.

It is not an unprimeable number, because it can be changed into a prime (20512741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (1864356).

Almost surely, 2^20512746 is an apocalyptic number.

20512746 is an abundant number, since it is smaller than the sum of its proper divisors (24231798).

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

20512746 is a wasteful number, since it uses less digits than its factorization.

20512746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7706 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20512746 is about 4529.0999105783. The cubic root of 20512746 is about 273.7418937989.

The spelling of 20512746 in words is "twenty million, five hundred twelve thousand, seven hundred forty-six".