213204242020 has 72 divisors (see below), whose sum is σ = 568175489280. Its totient is φ = 66453266880.

The previous prime is 213204242003. The next prime is 213204242033. The reversal of 213204242020 is 20242402312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 213204241982 and 213204242000.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9878100 + ... + 9899659.

It is an arithmetic number, because the mean of its divisors is an integer number (7891326240).

Almost surely, 2^213204242020 is an apocalyptic number.

213204242020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213204242020 is an abundant number, since it is smaller than the sum of its proper divisors (354971247260).

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

213204242020 is a wasteful number, since it uses less digits than its factorization.

213204242020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19777793 (or 19777784 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 213204242020 its reverse (20242402312), we get a palindrome (233446644332).

The spelling of 213204242020 in words is "two hundred thirteen billion, two hundred four million, two hundred forty-two thousand, twenty".