20219020 has 48 divisors (see below), whose sum is σ = 44241120. Its totient is φ = 7755264.

The previous prime is 20219011. The next prime is 20219033. The reversal of 20219020 is 2091202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20218985 and 20219003.

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, 65707 + ... + 66013.

It is an arithmetic number, because the mean of its divisors is an integer number (921690).

Almost surely, 2^20219020 is an apocalyptic number.

20219020 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 20219020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22120560).

20219020 is an abundant number, since it is smaller than the sum of its proper divisors (24022100).

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

20219020 is a wasteful number, since it uses less digits than its factorization.

20219020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20219020 is about 4496.5564602260. The cubic root of 20219020 is about 272.4290194724.

The spelling of 20219020 in words is "twenty million, two hundred nineteen thousand, twenty".