20862220 has 12 divisors (see below), whose sum is σ = 43810704. Its totient is φ = 8344880.

The previous prime is 20862217. The next prime is 20862221. The reversal of 20862220 is 2226802.

It is a junction number, because it is equal to n+sod(n) for n = 20862191 and 20862200.

It is not an unprimeable number, because it can be changed into a prime (20862221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521536 + ... + 521575.

It is an arithmetic number, because the mean of its divisors is an integer number (3650892).

Almost surely, 2^20862220 is an apocalyptic number.

20862220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20862220 is an abundant number, since it is smaller than the sum of its proper divisors (22948484).

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

20862220 is a wasteful number, since it uses less digits than its factorization.

20862220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043120 (or 1043118 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20862220 is about 4567.5179255259. The cubic root of 20862220 is about 275.2877209033.

The spelling of 20862220 in words is "twenty million, eight hundred sixty-two thousand, two hundred twenty".