1809698550020 has 48 divisors (see below), whose sum is σ = 3875142237120. Its totient is φ = 709702302336.

The previous prime is 1809698549999. The next prime is 1809698550041. The reversal of 1809698550020 is 200558969081.

It is an interprime number because it is at equal distance from previous prime (1809698549999) and next prime (1809698550041).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615682 + ... + 2495961.

It is an arithmetic number, because the mean of its divisors is an integer number (80732129940).

Almost surely, 2^{1809698550020} is an apocalyptic number.

1809698550020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1809698550020 is an abundant number, since it is smaller than the sum of its proper divisors (2065443687100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1809698550020 is a wasteful number, since it uses less digits than its factorization.

1809698550020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4112084 (or 4112082 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 1809698550020 in words is "one trillion, eight hundred nine billion, six hundred ninety-eight million, five hundred fifty thousand, twenty".