21476522223424 has 28 divisors (see below), whose sum is σ = 45124384012164. Its totient is φ = 10106598692864.

The previous prime is 21476522223361. The next prime is 21476522223433. The reversal of 21476522223424 is 42432222567412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19160159981824 + 2316362241600 = 4377232^2 + 1521960^2 .

It is a super-2 number, since 2×21476522223424² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9869724199 + ... + 9869726374.

Almost surely, 2^{21476522223424} is an apocalyptic number.

It is an amenable number.

21476522223424 is an abundant number, since it is smaller than the sum of its proper divisors (23647861788740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21476522223424 is a wasteful number, since it uses less digits than its factorization.

21476522223424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19739450602 (or 19739450592 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 46.

The spelling of 21476522223424 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred twenty-two million, two hundred twenty-three thousand, four hundred twenty-four".