3520212020 has 24 divisors (see below), whose sum is σ = 7961095464. Its totient is φ = 1299770496.

The previous prime is 3520212001. The next prime is 3520212053. The reversal of 3520212020 is 202120253.

It can be written as a sum of positive squares in 4 ways, for example, as 282374416 + 3237837604 = 16804^2 + 56902^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3520212020.

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, 6769379 + ... + 6769898.

It is an arithmetic number, because the mean of its divisors is an integer number (331712311).

Almost surely, 2^3520212020 is an apocalyptic number.

It is an amenable number.

3520212020 is an abundant number, since it is smaller than the sum of its proper divisors (4440883444).

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

3520212020 is a wasteful number, since it uses less digits than its factorization.

3520212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13539299 (or 13539297 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3520212020 is about 59331.3746680456. The cubic root of 3520212020 is about 1521.2115254331.

Adding to 3520212020 its reverse (202120253), we get a palindrome (3722332273).

The spelling of 3520212020 in words is "three billion, five hundred twenty million, two hundred twelve thousand, twenty".