21477314403793 has 2 divisors, whose sum is σ = 21477314403794. Its totient is φ = 21477314403792.

The previous prime is 21477314403719. The next prime is 21477314403827. The reversal of 21477314403793 is 39730441377412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18121427483329 + 3355886920464 = 4256927^2 + 1831908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21477314403793 is a prime.

It is a super-2 number, since 2×21477314403793² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21477314401793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738657201896 + 10738657201897.

It is an arithmetic number, because the mean of its divisors is an integer number (10738657201897).

Almost surely, 2^{21477314403793} is an apocalyptic number.

It is an amenable number.

21477314403793 is a deficient number, since it is larger than the sum of its proper divisors (1).

21477314403793 is an equidigital number, since it uses as much as digits as its factorization.

21477314403793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10668672, while the sum is 55.

The spelling of 21477314403793 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred fourteen million, four hundred three thousand, seven hundred ninety-three".