21741658859 has 2 divisors, whose sum is σ = 21741658860. Its totient is φ = 21741658858.

The previous prime is 21741658847. The next prime is 21741658871. The reversal of 21741658859 is 95885614712.

It is a balanced prime because it is at equal distance from previous prime (21741658847) and next prime (21741658871).

It is a cyclic number.

It is not a de Polignac number, because 21741658859 - 2⁴ = 21741658843 is a prime.

It is a super-2 number, since 2×21741658859² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21741658879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10870829429 + 10870829430.

It is an arithmetic number, because the mean of its divisors is an integer number (10870829430).

Almost surely, 2^21741658859 is an apocalyptic number.

21741658859 is a deficient number, since it is larger than the sum of its proper divisors (1).

21741658859 is an equidigital number, since it uses as much as digits as its factorization.

21741658859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 56.

The spelling of 21741658859 in words is "twenty-one billion, seven hundred forty-one million, six hundred fifty-eight thousand, eight hundred fifty-nine".