212404020 has 24 divisors (see below), whose sum is σ = 594731424. Its totient is φ = 56641056.

The previous prime is 212404007. The next prime is 212404079. The reversal of 212404020 is 20404212.

212404020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1769974 + ... + 1770093.

It is an arithmetic number, because the mean of its divisors is an integer number (24780476).

Almost surely, 2^212404020 is an apocalyptic number.

212404020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212404020 is an abundant number, since it is smaller than the sum of its proper divisors (382327404).

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

212404020 is a wasteful number, since it uses less digits than its factorization.

212404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540079 (or 3540077 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 212404020 is about 14574.0872784542. The cubic root of 212404020 is about 596.6517388912.

Adding to 212404020 its reverse (20404212), we get a palindrome (232808232).

The spelling of 212404020 in words is "two hundred twelve million, four hundred four thousand, twenty".