20679910 has 16 divisors (see below), whose sum is σ = 37348416. Its totient is φ = 8244288.

The previous prime is 20679877. The next prime is 20679959. The reversal of 20679910 is 1997602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (2334276).

Almost surely, 2^20679910 is an apocalyptic number.

20679910 is a deficient number, since it is larger than the sum of its proper divisors (16668506).

20679910 is a wasteful number, since it uses less digits than its factorization.

20679910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6927.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20679910 is about 4547.5169048614. The cubic root of 20679910 is about 274.4834822504.

The spelling of 20679910 in words is "twenty million, six hundred seventy-nine thousand, nine hundred ten".