2021020146 has 40 divisors (see below), whose sum is σ = 4794975900. Its totient is φ = 634044672.

The previous prime is 2021020091. The next prime is 2021020147. The reversal of 2021020146 is 6410201202.

It can be written as a sum of positive squares in 2 ways, for example, as 2020952025 + 68121 = 44955^2 + 261^2 .

It is a super-2 number, since 2×2021020146² = 8169044861075722632, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (2021020147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 364171 + ... + 369678.

Almost surely, 2^2021020146 is an apocalyptic number.

2021020146 is an abundant number, since it is smaller than the sum of its proper divisors (2773955754).

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

2021020146 is a wasteful number, since it uses less digits than its factorization.

2021020146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733880 (or 733871 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2021020146 is about 44955.7576512731. The cubic root of 2021020146 is about 1264.3196299680.

Adding to 2021020146 its reverse (6410201202), we get a palindrome (8431221348).

The spelling of 2021020146 in words is "two billion, twenty-one million, twenty thousand, one hundred forty-six".