20212770 has 32 divisors (see below), whose sum is σ = 51065280. Its totient is φ = 5106240.

The previous prime is 20212747. The next prime is 20212771. The reversal of 20212770 is 7721202.

It is not an unprimeable number, because it can be changed into a prime (20212771) 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, 17161 + ... + 18300.

It is an arithmetic number, because the mean of its divisors is an integer number (1595790).

Almost surely, 2^20212770 is an apocalyptic number.

20212770 is an abundant number, since it is smaller than the sum of its proper divisors (30852510).

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

20212770 is a wasteful number, since it uses less digits than its factorization.

20212770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35490.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20212770 is about 4495.8614302489. The cubic root of 20212770 is about 272.4009459581.

Adding to 20212770 its reverse (7721202), we get a palindrome (27933972).

The spelling of 20212770 in words is "twenty million, two hundred twelve thousand, seven hundred seventy".