21002814533 has 2 divisors, whose sum is σ = 21002814534. Its totient is φ = 21002814532.

The previous prime is 21002814409. The next prime is 21002814541. The reversal of 21002814533 is 33541820012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20915522884 + 87291649 = 144622^2 + 9343^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002814533 - 2¹⁰ = 21002813509 is a prime.

It is a super-2 number, since 2×21002814533² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21002814496 and 21002814505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002814233) 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 as a sum of consecutive naturals, namely, 10501407266 + 10501407267.

It is an arithmetic number, because the mean of its divisors is an integer number (10501407267).

Almost surely, 2^21002814533 is an apocalyptic number.

It is an amenable number.

21002814533 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002814533 is an equidigital number, since it uses as much as digits as its factorization.

21002814533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 21002814533 in words is "twenty-one billion, two million, eight hundred fourteen thousand, five hundred thirty-three".