1820463412277 has 4 divisors (see below), whose sum is σ = 1859196676416. Its totient is φ = 1781730148140.

The previous prime is 1820463412249. The next prime is 1820463412291. The reversal of 1820463412277 is 7722143640281.

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 1820463412277 - 2⁶ = 1820463412213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 38733264091 = 1820463412277 / (1 + 8 + 2 + 0 + 4 + 6 + 3 + 4 + 1 + 2 + 2 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820463412247) 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, 19366631999 + ... + 19366632092.

It is an arithmetic number, because the mean of its divisors is an integer number (464799169104).

Almost surely, 2^{1820463412277} is an apocalyptic number.

It is an amenable number.

1820463412277 is a deficient number, since it is larger than the sum of its proper divisors (38733264139).

1820463412277 is an equidigital number, since it uses as much as digits as its factorization.

1820463412277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38733264138.

The product of its (nonzero) digits is 903168, while the sum is 47.

The spelling of 1820463412277 in words is "one trillion, eight hundred twenty billion, four hundred sixty-three million, four hundred twelve thousand, two hundred seventy-seven".