21354669463 has 2 divisors, whose sum is σ = 21354669464. Its totient is φ = 21354669462.

The previous prime is 21354669431. The next prime is 21354669541. The reversal of 21354669463 is 36496645312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21354669463 - 2⁵ = 21354669431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21354669163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10677334731 + 10677334732.

It is an arithmetic number, because the mean of its divisors is an integer number (10677334732).

Almost surely, 2^21354669463 is an apocalyptic number.

21354669463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21354669463 is an equidigital number, since it uses as much as digits as its factorization.

21354669463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 49.

The spelling of 21354669463 in words is "twenty-one billion, three hundred fifty-four million, six hundred sixty-nine thousand, four hundred sixty-three".