20768512 has 36 divisors (see below), whose sum is σ = 42809536. Its totient is φ = 10045440.

The previous prime is 20768497. The next prime is 20768549. The reversal of 20768512 is 21586702.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 3 ways as a sum of consecutive naturals, for example, 6628 + ... + 9244.

Almost surely, 2^20768512 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 20768512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21404768).

20768512 is an abundant number, since it is smaller than the sum of its proper divisors (22041024).

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

20768512 is an equidigital number, since it uses as much as digits as its factorization.

20768512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664 (or 2650 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 20768512 is about 4557.2482925555. The cubic root of 20768512 is about 274.8749271462.

The spelling of 20768512 in words is "twenty million, seven hundred sixty-eight thousand, five hundred twelve".