20680910 has 16 divisors (see below), whose sum is σ = 38844576. Its totient is φ = 7912608.

The previous prime is 20680903. The next prime is 20680927. The reversal of 20680910 is 1908602.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20680910.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44729 + ... + 45188.

It is an arithmetic number, because the mean of its divisors is an integer number (2427786).

Almost surely, 2^20680910 is an apocalyptic number.

20680910 is a deficient number, since it is larger than the sum of its proper divisors (18163666).

20680910 is a wasteful number, since it uses less digits than its factorization.

20680910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89947.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 20680910 is about 4547.6268536458. The cubic root of 20680910 is about 274.4879064969.

The spelling of 20680910 in words is "twenty million, six hundred eighty thousand, nine hundred ten".