73203715021 has 4 divisors (see below), whose sum is σ = 73224287200. Its totient is φ = 73183142844.

The previous prime is 73203715001. The next prime is 73203715027. The reversal of 73203715021 is 12051730237.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73203715021 - 2⁵ = 73203714989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73203715027) 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, 10280751 + ... + 10287868.

It is an arithmetic number, because the mean of its divisors is an integer number (18306071800).

Almost surely, 2^73203715021 is an apocalyptic number.

It is an amenable number.

73203715021 is a deficient number, since it is larger than the sum of its proper divisors (20572179).

73203715021 is a wasteful number, since it uses less digits than its factorization.

73203715021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572178.

The product of its (nonzero) digits is 8820, while the sum is 31.

The spelling of 73203715021 in words is "seventy-three billion, two hundred three million, seven hundred fifteen thousand, twenty-one".