2020028381 has 12 divisors (see below), whose sum is σ = 2373100380. Its totient is φ = 1714305600.

The previous prime is 2020028363. The next prime is 2020028389. The reversal of 2020028381 is 1838200202.

It can be written as a sum of positive squares in 2 ways, for example, as 1734722500 + 285305881 = 41650^2 + 16891^2 .

It is not a de Polignac number, because 2020028381 - 2¹⁴ = 2020011997 is a prime.

It is a super-2 number, since 2×2020028381² = 8161029320090962322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2020028381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020028389) 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, 199136 + ... + 209033.

It is an arithmetic number, because the mean of its divisors is an integer number (197758365).

Almost surely, 2^2020028381 is an apocalyptic number.

It is an amenable number.

2020028381 is a deficient number, since it is larger than the sum of its proper divisors (353071999).

2020028381 is a wasteful number, since it uses less digits than its factorization.

2020028381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408284 (or 408277 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 2020028381 is about 44944.7258418605. The cubic root of 2020028381 is about 1264.1127850694.

Adding to 2020028381 its reverse (1838200202), we get a palindrome (3858228583).

The spelling of 2020028381 in words is "two billion, twenty million, twenty-eight thousand, three hundred eighty-one".