21868473459 has 8 divisors (see below), whose sum is σ = 33323388160. Its totient is φ = 12496270536.

The previous prime is 21868473457. The next prime is 21868473461. The reversal of 21868473459 is 95437486812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21868473457) and next prime (21868473461).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21868473459 - 2¹ = 21868473457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21868473399 and 21868473408.

It is not an unprimeable number, because it can be changed into a prime (21868473457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520677919 + ... + 520677960.

It is an arithmetic number, because the mean of its divisors is an integer number (4165423520).

Almost surely, 2^21868473459 is an apocalyptic number.

21868473459 is a deficient number, since it is larger than the sum of its proper divisors (11454914701).

21868473459 is a wasteful number, since it uses less digits than its factorization.

21868473459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041355889.

The product of its digits is 11612160, while the sum is 57.

The spelling of 21868473459 in words is "twenty-one billion, eight hundred sixty-eight million, four hundred seventy-three thousand, four hundred fifty-nine".