21036547829519 has 2 divisors, whose sum is σ = 21036547829520. Its totient is φ = 21036547829518.

The previous prime is 21036547829497. The next prime is 21036547829617. The reversal of 21036547829519 is 91592874563012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21036547829519 - 2¹⁶ = 21036547763983 is a prime.

It is a super-2 number, since 2×21036547829519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21036547129519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10518273914759 + 10518273914760.

It is an arithmetic number, because the mean of its divisors is an integer number (10518273914760).

It is a 1-persistent number, because it is pandigital, but 2⋅21036547829519 = 42073095659038 is not.

Almost surely, 2^{21036547829519} is an apocalyptic number.

21036547829519 is a deficient number, since it is larger than the sum of its proper divisors (1).

21036547829519 is an equidigital number, since it uses as much as digits as its factorization.

21036547829519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32659200, while the sum is 62.

The spelling of 21036547829519 in words is "twenty-one trillion, thirty-six billion, five hundred forty-seven million, eight hundred twenty-nine thousand, five hundred nineteen".