73020447473 has 4 divisors (see below), whose sum is σ = 73050364068. Its totient is φ = 72990530880.

The previous prime is 73020447469. The next prime is 73020447509. The reversal of 73020447473 is 37474402037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37474402037 = 24197 ⋅1548721.

It can be written as a sum of positive squares in 2 ways, for example, as 46290813409 + 26729634064 = 215153^2 + 163492^2 .

It is a cyclic number.

It is not a de Polignac number, because 73020447473 - 2² = 73020447469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73020447473.

It is not an unprimeable number, because it can be changed into a prime (73020447413) 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, 14954636 + ... + 14959517.

It is an arithmetic number, because the mean of its divisors is an integer number (18262591017).

Almost surely, 2^73020447473 is an apocalyptic number.

It is an amenable number.

73020447473 is a deficient number, since it is larger than the sum of its proper divisors (29916595).

73020447473 is a wasteful number, since it uses less digits than its factorization.

73020447473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29916594.

The product of its (nonzero) digits is 395136, while the sum is 41.

The spelling of 73020447473 in words is "seventy-three billion, twenty million, four hundred forty-seven thousand, four hundred seventy-three".