21073767350547 has 4 divisors (see below), whose sum is σ = 28098356467400. Its totient is φ = 14049178233696.

The previous prime is 21073767350527. The next prime is 21073767350549. The reversal of 21073767350547 is 74505376737012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21073767350547 - 2²⁰ = 21073766301971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21073767350549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3512294558422 + ... + 3512294558427.

It is an arithmetic number, because the mean of its divisors is an integer number (7024589116850).

Almost surely, 2^{21073767350547} is an apocalyptic number.

21073767350547 is a deficient number, since it is larger than the sum of its proper divisors (7024589116853).

21073767350547 is an equidigital number, since it uses as much as digits as its factorization.

21073767350547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7024589116852.

The product of its (nonzero) digits is 25930800, while the sum is 57.

The spelling of 21073767350547 in words is "twenty-one trillion, seventy-three billion, seven hundred sixty-seven million, three hundred fifty thousand, five hundred forty-seven".