21677562463 has 2 divisors, whose sum is σ = 21677562464. Its totient is φ = 21677562462.

The previous prime is 21677562457. The next prime is 21677562469. The reversal of 21677562463 is 36426577612.

It is a balanced prime because it is at equal distance from previous prime (21677562457) and next prime (21677562469).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21677562463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21677562469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10838781231 + 10838781232.

It is an arithmetic number, because the mean of its divisors is an integer number (10838781232).

Almost surely, 2^21677562463 is an apocalyptic number.

21677562463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21677562463 is an equidigital number, since it uses as much as digits as its factorization.

21677562463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 49.

The spelling of 21677562463 in words is "twenty-one billion, six hundred seventy-seven million, five hundred sixty-two thousand, four hundred sixty-three".