1800920449219 has 16 divisors (see below), whose sum is σ = 1907863876480. Its totient is φ = 1695198637440.

The previous prime is 1800920449213. The next prime is 1800920449253. The reversal of 1800920449219 is 9129440290081.

It is a cyclic number.

It is not a de Polignac number, because 1800920449219 - 2⁹ = 1800920448707 is a prime.

It is a super-2 number, since 2×1800920449219² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1800920449213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11370964 + ... + 11528254.

It is an arithmetic number, because the mean of its divisors is an integer number (119241492280).

Almost surely, 2^{1800920449219} is an apocalyptic number.

1800920449219 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1800920449219 is a deficient number, since it is larger than the sum of its proper divisors (106943427261).

1800920449219 is a wasteful number, since it uses less digits than its factorization.

1800920449219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161170.

The product of its (nonzero) digits is 373248, while the sum is 49.

The spelling of 1800920449219 in words is "one trillion, eight hundred billion, nine hundred twenty million, four hundred forty-nine thousand, two hundred nineteen".