2021340242 has 8 divisors (see below), whose sum is σ = 3035817036. Its totient is φ = 1009401232.

The previous prime is 2021340241. The next prime is 2021340247. The reversal of 2021340242 is 2420431202.

It can be written as a sum of positive squares in 2 ways, for example, as 2021311681 + 28561 = 44959^2 + 169^2 .

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

It is a super-3 number, since 3×2021340242³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021340241) 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, 632453 + ... + 635640.

Almost surely, 2^2021340242 is an apocalyptic number.

2021340242 is a deficient number, since it is larger than the sum of its proper divisors (1014476794).

2021340242 is a wasteful number, since it uses less digits than its factorization.

2021340242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268892.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2021340242 is about 44959.3176327221. The cubic root of 2021340242 is about 1264.3863755161.

Adding to 2021340242 its reverse (2420431202), we get a palindrome (4441771444).

The spelling of 2021340242 in words is "two billion, twenty-one million, three hundred forty thousand, two hundred forty-two".