2021340442 has 16 divisors (see below), whose sum is σ = 3310558272. Its totient is φ = 917982720.

The previous prime is 2021340437. The next prime is 2021340521. The reversal of 2021340442 is 2440431202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14478 + ... + 65209.

It is an arithmetic number, because the mean of its divisors is an integer number (206909892).

Almost surely, 2^2021340442 is an apocalyptic number.

2021340442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2021340442 is a deficient number, since it is larger than the sum of its proper divisors (1289217830).

2021340442 is a wasteful number, since it uses less digits than its factorization.

2021340442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80853.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 2021340442 is about 44959.3198569551. The cubic root of 2021340442 is about 1264.3864172173.

Adding to 2021340442 its reverse (2440431202), we get a palindrome (4461771644).

The spelling of 2021340442 in words is "two billion, twenty-one million, three hundred forty thousand, four hundred forty-two".