21415141663 has 2 divisors, whose sum is σ = 21415141664. Its totient is φ = 21415141662.

The previous prime is 21415141591. The next prime is 21415141703. The reversal of 21415141663 is 36614151412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21415141663 - 2²¹ = 21413044511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21415141763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10707570831 + 10707570832.

It is an arithmetic number, because the mean of its divisors is an integer number (10707570832).

Almost surely, 2^21415141663 is an apocalyptic number.

21415141663 is a deficient number, since it is larger than the sum of its proper divisors (1).

21415141663 is an equidigital number, since it uses as much as digits as its factorization.

21415141663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The spelling of 21415141663 in words is "twenty-one billion, four hundred fifteen million, one hundred forty-one thousand, six hundred sixty-three".