21033562079 has 2 divisors, whose sum is σ = 21033562080. Its totient is φ = 21033562078.

The previous prime is 21033562061. The next prime is 21033562097. The reversal of 21033562079 is 97026533012.

Together with next prime (21033562097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (21033562061) and next prime (21033562097).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21033562079 is a prime.

It is a super-2 number, since 2×21033562079² (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 (21033562019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10516781039 + 10516781040.

It is an arithmetic number, because the mean of its divisors is an integer number (10516781040).

Almost surely, 2^21033562079 is an apocalyptic number.

21033562079 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033562079 is an equidigital number, since it uses as much as digits as its factorization.

21033562079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 21033562079 in words is "twenty-one billion, thirty-three million, five hundred sixty-two thousand, seventy-nine".