21102026459 has 2 divisors, whose sum is σ = 21102026460. Its totient is φ = 21102026458.

The previous prime is 21102026333. The next prime is 21102026467. The reversal of 21102026459 is 95462020112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102026459 - 2¹² = 21102022363 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102026159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551013229 + 10551013230.

It is an arithmetic number, because the mean of its divisors is an integer number (10551013230).

Almost surely, 2^21102026459 is an apocalyptic number.

21102026459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102026459 is an equidigital number, since it uses as much as digits as its factorization.

21102026459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 21102026459 in words is "twenty-one billion, one hundred two million, twenty-six thousand, four hundred fifty-nine".