21477314242249 has 4 divisors (see below), whose sum is σ = 21478289132160. Its totient is φ = 21476339352340.

The previous prime is 21477314242243. The next prime is 21477314242271. The reversal of 21477314242249 is 94224241377412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21477314242249 - 2¹¹ = 21477314240201 is a prime.

It is a super-2 number, since 2×21477314242249² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21477314242196 and 21477314242205.

It is not an unprimeable number, because it can be changed into a prime (21477314242243) 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, 487411909 + ... + 487455970.

It is an arithmetic number, because the mean of its divisors is an integer number (5369572283040).

Almost surely, 2^{21477314242249} is an apocalyptic number.

It is an amenable number.

21477314242249 is a deficient number, since it is larger than the sum of its proper divisors (974889911).

21477314242249 is an equidigital number, since it uses as much as digits as its factorization.

21477314242249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974889910.

The product of its digits is 5419008, while the sum is 52.

The spelling of 21477314242249 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred fourteen million, two hundred forty-two thousand, two hundred forty-nine".