1918476572820 has 192 divisors, whose sum is σ = 5719583923200. Its totient is φ = 479702845440.

The previous prime is 1918476572813. The next prime is 1918476572939. The reversal of 1918476572820 is 282756748191.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8270662 + ... + 8499458.

It is an arithmetic number, because the mean of its divisors is an integer number (29789499600).

Almost surely, 2^{1918476572820} is an apocalyptic number.

1918476572820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1918476572820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859791961600).

1918476572820 is an abundant number, since it is smaller than the sum of its proper divisors (3801107350380).

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

1918476572820 is a wasteful number, since it uses less digits than its factorization.

1918476572820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228978 (or 228976 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 1918476572820 in words is "one trillion, nine hundred eighteen billion, four hundred seventy-six million, five hundred seventy-two thousand, eight hundred twenty".