20689676 has 12 divisors (see below), whose sum is σ = 41379408. Its totient is φ = 8866992.

The previous prime is 20689661. The next prime is 20689699. The reversal of 20689676 is 67698602.

20689676 is an admirable number.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 369431 + ... + 369486.

It is an arithmetic number, because the mean of its divisors is an integer number (3448284).

Almost surely, 2^20689676 is an apocalyptic number.

It is an amenable number.

20689676 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20689676 is a wasteful number, since it uses less digits than its factorization.

20689676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738928 (or 738926 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 20689676 is about 4548.5905509289. The cubic root of 20689676 is about 274.5266833384.

The spelling of 20689676 in words is "twenty million, six hundred eighty-nine thousand, six hundred seventy-six".