20166020 has 48 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 6674304.

The previous prime is 20166001. The next prime is 20166053. The reversal of 20166020 is 2066102.

It is a self number, because there is not a number n which added to its sum of digits gives 20166020.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1577 + ... + 6543.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^20166020 is an apocalyptic number.

20166020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20166020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25038720).

20166020 is an abundant number, since it is smaller than the sum of its proper divisors (29911420).

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

20166020 is a wasteful number, since it uses less digits than its factorization.

20166020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5012 (or 5010 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20166020 is about 4490.6591943722. The cubic root of 20166020 is about 272.1907723088.

The spelling of 20166020 in words is "twenty million, one hundred sixty-six thousand, twenty".