21046908711539 has 2 divisors, whose sum is σ = 21046908711540. Its totient is φ = 21046908711538.

The previous prime is 21046908711473. The next prime is 21046908711583. The reversal of 21046908711539 is 93511780964012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21046908711539 - 2¹⁶ = 21046908646003 is a prime.

It is a super-2 number, since 2×21046908711539² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21046908710539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10523454355769 + 10523454355770.

It is an arithmetic number, because the mean of its divisors is an integer number (10523454355770).

It is a 1-persistent number, because it is pandigital, but 2⋅21046908711539 = 42093817423078 is not.

Almost surely, 2^{21046908711539} is an apocalyptic number.

21046908711539 is a deficient number, since it is larger than the sum of its proper divisors (1).

21046908711539 is an equidigital number, since it uses as much as digits as its factorization.

21046908711539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 21046908711539 in words is "twenty-one trillion, forty-six billion, nine hundred eight million, seven hundred eleven thousand, five hundred thirty-nine".