21185148854628 has 60 divisors (see below), whose sum is σ = 60416906002992. Its totient is φ = 6419742076080.

The previous prime is 21185148854561. The next prime is 21185148854659. The reversal of 21185148854628 is 82645884158112.

21185148854628 is a `hidden beast` number, since 2 + 1 + 1 + 8 + 5 + 1 + 4 + 88 + 546 + 2 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2972099250 + ... + 2972106377.

Almost surely, 2^{21185148854628} is an apocalyptic number.

It is an amenable number.

21185148854628 is an abundant number, since it is smaller than the sum of its proper divisors (39231757148364).

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

21185148854628 is a wasteful number, since it uses less digits than its factorization.

21185148854628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944205654 (or 5944205643 counting only the distinct ones).

The product of its digits is 39321600, while the sum is 63.

The spelling of 21185148854628 in words is "twenty-one trillion, one hundred eighty-five billion, one hundred forty-eight million, eight hundred fifty-four thousand, six hundred twenty-eight".