21032689511 has 2 divisors, whose sum is σ = 21032689512. Its totient is φ = 21032689510.

The previous prime is 21032689501. The next prime is 21032689541. The reversal of 21032689511 is 11598623012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21032689511 is a prime.

It is a super-2 number, since 2×21032689511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21032689501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516344755 + 10516344756.

It is an arithmetic number, because the mean of its divisors is an integer number (10516344756).

Almost surely, 2^21032689511 is an apocalyptic number.

21032689511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21032689511 is an equidigital number, since it uses as much as digits as its factorization.

21032689511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 21032689511 in words is "twenty-one billion, thirty-two million, six hundred eighty-nine thousand, five hundred eleven".