21542167412073 has 64 divisors (see below), whose sum is σ = 41161329100800. Its totient is φ = 10804848828480.

The previous prime is 21542167412039. The next prime is 21542167412089. The reversal of 21542167412073 is 37021476124512.

21542167412073 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 2 + 167 + 412 + 0 + 73 = 666.

It is not a de Polignac number, because 21542167412073 - 2¹² = 21542167407977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21542167416073) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 178591311 + ... + 178711892.

It is an arithmetic number, because the mean of its divisors is an integer number (643145767200).

Almost surely, 2^{21542167412073} is an apocalyptic number.

It is an amenable number.

21542167412073 is a deficient number, since it is larger than the sum of its proper divisors (19619161688727).

21542167412073 is a wasteful number, since it uses less digits than its factorization.

21542167412073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357303259 (or 357303253 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 21542167412073 in words is "twenty-one trillion, five hundred forty-two billion, one hundred sixty-seven million, four hundred twelve thousand, seventy-three".