21409534733548 has 24 divisors (see below), whose sum is σ = 40415210982272. Its totient is φ = 9865044756864.

The previous prime is 21409534733537. The next prime is 21409534733563. The reversal of 21409534733548 is 84533743590412.

It is a junction number, because it is equal to n+sod(n) for n = 21409534733492 and 21409534733501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339113265 + ... + 339176392.

Almost surely, 2^{21409534733548} is an apocalyptic number.

It is an amenable number.

21409534733548 is a deficient number, since it is larger than the sum of its proper divisors (19005676248724).

21409534733548 is a wasteful number, since it uses less digits than its factorization.

21409534733548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678290281 (or 678290279 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 58.

The spelling of 21409534733548 in words is "twenty-one trillion, four hundred nine billion, five hundred thirty-four million, seven hundred thirty-three thousand, five hundred forty-eight".