4003020522 has 24 divisors (see below), whose sum is σ = 8728460676. Its totient is φ = 1325840256.

The previous prime is 4003020521. The next prime is 4003020523. The reversal of 4003020522 is 2250203004.

It is an interprime number because it is at equal distance from previous prime (4003020521) and next prime (4003020523).

It can be written as a sum of positive squares in 2 ways, for example, as 3868715601 + 134304921 = 62199^2 + 11589^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 4003020495 and 4003020504.

It is not an unprimeable number, because it can be changed into a prime (4003020521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 705423 + ... + 711074.

Almost surely, 2^4003020522 is an apocalyptic number.

4003020522 is an abundant number, since it is smaller than the sum of its proper divisors (4725440154).

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

4003020522 is a wasteful number, since it uses less digits than its factorization.

4003020522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416662 (or 1416659 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 4003020522 is about 63269.4280201742. The cubic root of 4003020522 is about 1587.8005164192.

Adding to 4003020522 its reverse (2250203004), we get a palindrome (6253223526).

The spelling of 4003020522 in words is "four billion, three million, twenty thousand, five hundred twenty-two".