1972820182747 has 4 divisors (see below), whose sum is σ = 2000606382576. Its totient is φ = 1945033982920.

The previous prime is 1972820182741. The next prime is 1972820182757. The reversal of 1972820182747 is 7472810282791.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1972820182747 - 2¹¹ = 1972820180699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1972820182691 and 1972820182700.

It is not an unprimeable number, because it can be changed into a prime (1972820182741) 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, 13893099808 + ... + 13893099949.

It is an arithmetic number, because the mean of its divisors is an integer number (500151595644).

Almost surely, 2^{1972820182747} is an apocalyptic number.

1972820182747 is a deficient number, since it is larger than the sum of its proper divisors (27786199829).

1972820182747 is an equidigital number, since it uses as much as digits as its factorization.

1972820182747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27786199828.

The product of its (nonzero) digits is 6322176, while the sum is 58.

The spelling of 1972820182747 in words is "one trillion, nine hundred seventy-two billion, eight hundred twenty million, one hundred eighty-two thousand, seven hundred forty-seven".