20202270 has 64 divisors (see below), whose sum is σ = 54743040. Its totient is φ = 4726400.

The previous prime is 20202251. The next prime is 20202311. The reversal of 20202270 is 7220202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8515 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (855360).

Almost surely, 2^20202270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20202270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27371520).

20202270 is an abundant number, since it is smaller than the sum of its proper divisors (34540770).

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

20202270 is a wasteful number, since it uses less digits than its factorization.

20202270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161.

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 20202270 is about 4494.6935379400. The cubic root of 20202270 is about 272.3537694233.

Adding to 20202270 its reverse (7220202), we get a palindrome (27422472).

The spelling of 20202270 in words is "twenty million, two hundred two thousand, two hundred seventy".