21018014363 has 2 divisors, whose sum is σ = 21018014364. Its totient is φ = 21018014362.

The previous prime is 21018014327. The next prime is 21018014383. The reversal of 21018014363 is 36341081012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21018014363 - 2¹⁸ = 21017752219 is a prime.

It is not a weakly prime, because it can be changed into another prime (21018014383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10509007181 + 10509007182.

It is an arithmetic number, because the mean of its divisors is an integer number (10509007182).

Almost surely, 2^21018014363 is an apocalyptic number.

21018014363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21018014363 is an equidigital number, since it uses as much as digits as its factorization.

21018014363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 21018014363 its reverse (36341081012), we get a palindrome (57359095375).

The spelling of 21018014363 in words is "twenty-one billion, eighteen million, fourteen thousand, three hundred sixty-three".