20730812 has 12 divisors (see below), whose sum is σ = 36312360. Its totient is φ = 10355856.

The previous prime is 20730799. The next prime is 20730823. The reversal of 20730812 is 21803702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114 + ... + 8222.

It is an arithmetic number, because the mean of its divisors is an integer number (3026030).

Almost surely, 2^20730812 is an apocalyptic number.

It is an amenable number.

20730812 is a deficient number, since it is larger than the sum of its proper divisors (15581548).

20730812 is a wasteful number, since it uses less digits than its factorization.

20730812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780 (or 4778 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20730812 is about 4553.1101458234. The cubic root of 20730812 is about 274.7085043515.

The spelling of 20730812 in words is "twenty million, seven hundred thirty thousand, eight hundred twelve".