20680650 has 48 divisors (see below), whose sum is σ = 56990400. Its totient is φ = 5514480.

The previous prime is 20680637. The next prime is 20680651. The reversal of 20680650 is 5608602.

20680650 is a `hidden beast` number, since 2 + 0 + 6 + 8 + 0 + 650 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20680651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6310 + ... + 9009.

It is an arithmetic number, because the mean of its divisors is an integer number (1187300).

Almost surely, 2^20680650 is an apocalyptic number.

20680650 is an abundant number, since it is smaller than the sum of its proper divisors (36309750).

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

20680650 is a wasteful number, since it uses less digits than its factorization.

20680650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340 (or 15329 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 20680650 is about 4547.5982672175. The cubic root of 20680650 is about 274.4867562066.

The spelling of 20680650 in words is "twenty million, six hundred eighty thousand, six hundred fifty".