212020434 has 24 divisors (see below), whose sum is σ = 471794700. Its totient is φ = 68763168.

The previous prime is 212020433. The next prime is 212020483. The reversal of 212020434 is 434020212.

212020434 is a `hidden beast` number, since 212 + 0 + 20 + 434 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 170224209 + 41796225 = 13047^2 + 6465^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (212020433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158509 + ... + 159840.

Almost surely, 2^212020434 is an apocalyptic number.

212020434 is an abundant number, since it is smaller than the sum of its proper divisors (259774266).

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

212020434 is a wasteful number, since it uses less digits than its factorization.

212020434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318394 (or 318391 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 212020434 is about 14560.9214680940. The cubic root of 212020434 is about 596.2923527791.

Adding to 212020434 its reverse (434020212), we get a palindrome (646040646).

The spelling of 212020434 in words is "two hundred twelve million, twenty thousand, four hundred thirty-four".