20680611 has 32 divisors (see below), whose sum is σ = 33619968. Its totient is φ = 11051040.

The previous prime is 20680603. The next prime is 20680613. The reversal of 20680611 is 11608602.

It is not a de Polignac number, because 20680611 - 2³ = 20680603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20680613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22246 + ... + 23156.

It is an arithmetic number, because the mean of its divisors is an integer number (1050624).

Almost surely, 2^20680611 is an apocalyptic number.

20680611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20680611 is a deficient number, since it is larger than the sum of its proper divisors (12939357).

20680611 is a wasteful number, since it uses less digits than its factorization.

20680611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 20680611 is about 4547.5939792378. The cubic root of 20680611 is about 274.4865836622.

The spelling of 20680611 in words is "twenty million, six hundred eighty thousand, six hundred eleven".