72020823345 has 24 divisors (see below), whose sum is σ = 125662834752. Its totient is φ = 38156724000.

The previous prime is 72020823341. The next prime is 72020823361. The reversal of 72020823345 is 54332802027.

It is not a de Polignac number, because 72020823345 - 2² = 72020823341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72020823341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5292751 + ... + 5306340.

It is an arithmetic number, because the mean of its divisors is an integer number (5235951448).

Almost surely, 2^72020823345 is an apocalyptic number.

It is an amenable number.

72020823345 is a deficient number, since it is larger than the sum of its proper divisors (53642011407).

72020823345 is a wasteful number, since it uses less digits than its factorization.

72020823345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10599253 (or 10599250 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 72020823345 in words is "seventy-two billion, twenty million, eight hundred twenty-three thousand, three hundred forty-five".