1820004675551 has 4 divisors (see below), whose sum is σ = 1820031939600. Its totient is φ = 1819977411504.

The previous prime is 1820004675523. The next prime is 1820004675589. The reversal of 1820004675551 is 1555764000281.

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 1820004675551 - 2⁶ = 1820004675487 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 (1820004635551) 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, 13531646 + ... + 13665483.

It is an arithmetic number, because the mean of its divisors is an integer number (455007984900).

Almost surely, 2^{1820004675551} is an apocalyptic number.

1820004675551 is a deficient number, since it is larger than the sum of its proper divisors (27264049).

1820004675551 is an equidigital number, since it uses as much as digits as its factorization.

1820004675551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27264048.

The product of its (nonzero) digits is 336000, while the sum is 44.

The spelling of 1820004675551 in words is "one trillion, eight hundred twenty billion, four million, six hundred seventy-five thousand, five hundred fifty-one".