18372919092820 has 48 divisors (see below), whose sum is σ = 38748725164800. Its totient is φ = 7317658247040.

The previous prime is 18372919092817. The next prime is 18372919092821. The reversal of 18372919092820 is 2829091927381.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18372919092821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8030451 + ... + 10061509.

It is an arithmetic number, because the mean of its divisors is an integer number (807265107600).

Almost surely, 2^{18372919092820} is an apocalyptic number.

18372919092820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18372919092820 is an abundant number, since it is smaller than the sum of its proper divisors (20375806071980).

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

18372919092820 is a wasteful number, since it uses less digits than its factorization.

18372919092820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033008 (or 2033006 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 61.

The spelling of 18372919092820 in words is "eighteen trillion, three hundred seventy-two billion, nine hundred nineteen million, ninety-two thousand, eight hundred twenty".