20466620 has 24 divisors (see below), whose sum is σ = 43896384. Its totient is φ = 8012096.

The previous prime is 20466617. The next prime is 20466631. The reversal of 20466620 is 2666402.

It is a self number, because there is not a number n which added to its sum of digits gives 20466620.

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, 9947 + ... + 11826.

It is an arithmetic number, because the mean of its divisors is an integer number (1829016).

Almost surely, 2^20466620 is an apocalyptic number.

20466620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20466620 is an abundant number, since it is smaller than the sum of its proper divisors (23429764).

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

20466620 is a wasteful number, since it uses less digits than its factorization.

20466620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21829 (or 21827 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20466620 is about 4524.0048629505. The cubic root of 20466620 is about 273.5365565138.

The spelling of 20466620 in words is "twenty million, four hundred sixty-six thousand, six hundred twenty".