20262220 has 48 divisors (see below), whose sum is σ = 47932416. Its totient is φ = 7128000.

The previous prime is 20262197. The next prime is 20262223. The reversal of 20262220 is 2226202.

It is a junction number, because it is equal to n+sod(n) for n = 20262194 and 20262203.

It is not an unprimeable number, because it can be changed into a prime (20262223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5335 + ... + 8305.

It is an arithmetic number, because the mean of its divisors is an integer number (998592).

Almost surely, 2^20262220 is an apocalyptic number.

20262220 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 20262220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23966208).

20262220 is an abundant number, since it is smaller than the sum of its proper divisors (27670196).

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

20262220 is a wasteful number, since it uses less digits than its factorization.

20262220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022 (or 3020 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20262220 is about 4501.3575729995. The cubic root of 20262220 is about 272.6229055878.

Adding to 20262220 its reverse (2226202), we get a palindrome (22488422).

The spelling of 20262220 in words is "twenty million, two hundred sixty-two thousand, two hundred twenty".