2021458490 has 8 divisors (see below), whose sum is σ = 3638625300. Its totient is φ = 808583392.

The previous prime is 2021458459. The next prime is 2021458493. The reversal of 2021458490 is 948541202.

It can be written as a sum of positive squares in 2 ways, for example, as 1861663609 + 159794881 = 43147^2 + 12641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2021458490.

It is not an unprimeable number, because it can be changed into a prime (2021458493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101072915 + ... + 101072934.

Almost surely, 2^2021458490 is an apocalyptic number.

2021458490 is a deficient number, since it is larger than the sum of its proper divisors (1617166810).

2021458490 is a wasteful number, since it uses less digits than its factorization.

2021458490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202145856.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 2021458490 is about 44960.6326690361. The cubic root of 2021458490 is about 1264.4110304854.

Adding to 2021458490 its reverse (948541202), we get a palindrome (2969999692).

The spelling of 2021458490 in words is "two billion, twenty-one million, four hundred fifty-eight thousand, four hundred ninety".