20066620 has 24 divisors (see below), whose sum is σ = 48160224. Its totient is φ = 6879936.

The previous prime is 20066611. The next prime is 20066623. The reversal of 20066620 is 2666002.

It is a junction number, because it is equal to n+sod(n) for n = 20066591 and 20066600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71527 + ... + 71806.

It is an arithmetic number, because the mean of its divisors is an integer number (2006676).

Almost surely, 2^20066620 is an apocalyptic number.

20066620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20066620 is an abundant number, since it is smaller than the sum of its proper divisors (28093604).

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

20066620 is a wasteful number, since it uses less digits than its factorization.

20066620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143349 (or 143347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20066620 is about 4479.5781051345. The cubic root of 20066620 is about 271.7428184691.

The spelling of 20066620 in words is "twenty million, sixty-six thousand, six hundred twenty".