7000020 has 120 divisors (see below), whose sum is σ = 22869000. Its totient is φ = 1790208.

The previous prime is 7000009. The next prime is 7000033. The reversal of 7000020 is 200007.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 6906384 = 306^2 + 2628^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 6999966 and 7000011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46906 + ... + 47054.

It is an arithmetic number, because the mean of its divisors is an integer number (190575).

Almost surely, 2^7000020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7000020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11434500).

7000020 is an abundant number, since it is smaller than the sum of its proper divisors (15868980).

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

7000020 is a wasteful number, since it uses less digits than its factorization.

7000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 9.

The square root of 7000020 is about 2645.7550907066. The cubic root of 7000020 is about 191.2933004610.

Adding to 7000020 its reverse (200007), we get a palindrome (7200027).

The spelling of 7000020 in words is "seven million, twenty", and thus it is an aban number and an uban number.