21414333641 has 2 divisors, whose sum is σ = 21414333642. Its totient is φ = 21414333640.

The previous prime is 21414333623. The next prime is 21414333653. The reversal of 21414333641 is 14633341412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12038478400 + 9375855241 = 109720^2 + 96829^2 .

It is a cyclic number.

It is not a de Polignac number, because 21414333641 - 2¹⁰ = 21414332617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21414333598 and 21414333607.

It is not a weakly prime, because it can be changed into another prime (21414336641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707166820 + 10707166821.

It is an arithmetic number, because the mean of its divisors is an integer number (10707166821).

Almost surely, 2^21414333641 is an apocalyptic number.

It is an amenable number.

21414333641 is a deficient number, since it is larger than the sum of its proper divisors (1).

21414333641 is an equidigital number, since it uses as much as digits as its factorization.

21414333641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 32.

The spelling of 21414333641 in words is "twenty-one billion, four hundred fourteen million, three hundred thirty-three thousand, six hundred forty-one".