20628704 has 12 divisors (see below), whose sum is σ = 40612824. Its totient is φ = 10314336.

The previous prime is 20628683. The next prime is 20628709. The reversal of 20628704 is 40782602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20628709) by changing a digit.

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 as a sum of consecutive naturals, namely, 322292 + ... + 322355.

It is an arithmetic number, because the mean of its divisors is an integer number (3384402).

Almost surely, 2^20628704 is an apocalyptic number.

It is an amenable number.

20628704 is a deficient number, since it is larger than the sum of its proper divisors (19984120).

20628704 is an equidigital number, since it uses as much as digits as its factorization.

20628704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644657 (or 644649 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20628704 is about 4541.8833098176. The cubic root of 20628704 is about 274.2567433852.

The spelling of 20628704 in words is "twenty million, six hundred twenty-eight thousand, seven hundred four".