12720020973 has 16 divisors (see below), whose sum is σ = 18527616000. Its totient is φ = 7698367280.

The previous prime is 12720020939. The next prime is 12720021001. The reversal of 12720020973 is 37902002721.

It is a cyclic number.

It is not a de Polignac number, because 12720020973 - 2⁶ = 12720020909 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720020473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244323 + ... + 291776.

It is an arithmetic number, because the mean of its divisors is an integer number (1157976000).

Almost surely, 2^12720020973 is an apocalyptic number.

It is an amenable number.

12720020973 is a deficient number, since it is larger than the sum of its proper divisors (5807595027).

12720020973 is a wasteful number, since it uses less digits than its factorization.

12720020973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536832.

The product of its (nonzero) digits is 10584, while the sum is 33.

The spelling of 12720020973 in words is "twelve billion, seven hundred twenty million, twenty thousand, nine hundred seventy-three".