21477314403771 has 4 divisors (see below), whose sum is σ = 28636419205032. Its totient is φ = 14318209602512.

The previous prime is 21477314403719. The next prime is 21477314403793. The reversal of 21477314403771 is 17730441377412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21477314403771 - 2¹⁴ = 21477314387387 is a prime.

It is a super-2 number, since 2×21477314403771² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477314403071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3579552400626 + ... + 3579552400631.

It is an arithmetic number, because the mean of its divisors is an integer number (7159104801258).

Almost surely, 2^{21477314403771} is an apocalyptic number.

21477314403771 is a deficient number, since it is larger than the sum of its proper divisors (7159104801261).

21477314403771 is an equidigital number, since it uses as much as digits as its factorization.

21477314403771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7159104801260.

The product of its (nonzero) digits is 2765952, while the sum is 51.

The spelling of 21477314403771 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred fourteen million, four hundred three thousand, seven hundred seventy-one".