2021993822533 has 2 divisors, whose sum is σ = 2021993822534. Its totient is φ = 2021993822532.

The previous prime is 2021993822521. The next prime is 2021993822621. The reversal of 2021993822533 is 3352283991202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1608881685889 + 413112136644 = 1268417^2 + 642738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021993822533 is a prime.

It is a super-2 number, since 2×2021993822533² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021993822503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010996911266 + 1010996911267.

It is an arithmetic number, because the mean of its divisors is an integer number (1010996911267).

Almost surely, 2^{2021993822533} is an apocalyptic number.

It is an amenable number.

2021993822533 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021993822533 is an equidigital number, since it uses as much as digits as its factorization.

2021993822533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 49.

The spelling of 2021993822533 in words is "two trillion, twenty-one billion, nine hundred ninety-three million, eight hundred twenty-two thousand, five hundred thirty-three".