21477317530619 has 2 divisors, whose sum is σ = 21477317530620. Its totient is φ = 21477317530618.

The previous prime is 21477317530507. The next prime is 21477317530703. The reversal of 21477317530619 is 91603571377412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21477317530619 - 2³² = 21473022563323 is a prime.

It is a super-2 number, since 2×21477317530619² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21477317530219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738658765309 + 10738658765310.

It is an arithmetic number, because the mean of its divisors is an integer number (10738658765310).

Almost surely, 2^{21477317530619} is an apocalyptic number.

21477317530619 is a deficient number, since it is larger than the sum of its proper divisors (1).

21477317530619 is an equidigital number, since it uses as much as digits as its factorization.

21477317530619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6667920, while the sum is 56.

The spelling of 21477317530619 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred seventeen million, five hundred thirty thousand, six hundred nineteen".