21798429463 has 2 divisors, whose sum is σ = 21798429464. Its totient is φ = 21798429462.

The previous prime is 21798429461. The next prime is 21798429467. The reversal of 21798429463 is 36492489712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21798429463 - 2¹ = 21798429461 is a prime.

Together with 21798429461, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21798429461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10899214731 + 10899214732.

It is an arithmetic number, because the mean of its divisors is an integer number (10899214732).

Almost surely, 2^21798429463 is an apocalyptic number.

21798429463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21798429463 is an equidigital number, since it uses as much as digits as its factorization.

21798429463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The spelling of 21798429463 in words is "twenty-one billion, seven hundred ninety-eight million, four hundred twenty-nine thousand, four hundred sixty-three".