21548775094992 has 100 divisors (see below), whose sum is σ = 62369718290880. Its totient is φ = 7182774004032.

The previous prime is 21548775094991. The next prime is 21548775095059. The reversal of 21548775094992 is 29949057784512.

It is a happy number.

21548775094992 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 8 + 77 + 509 + 49 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 21548775094992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21548775094991) 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 19 ways as a sum of consecutive naturals, for example, 73444359 + ... + 73737177.

Almost surely, 2^{21548775094992} is an apocalyptic number.

It is an amenable number.

21548775094992 is an abundant number, since it is smaller than the sum of its proper divisors (40820943195888).

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

21548775094992 is a wasteful number, since it uses less digits than its factorization.

21548775094992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349622 (or 349607 counting only the distinct ones).

The product of its (nonzero) digits is 457228800, while the sum is 72.

The spelling of 21548775094992 in words is "twenty-one trillion, five hundred forty-eight billion, seven hundred seventy-five million, ninety-four thousand, nine hundred ninety-two".