2018021955840 has 576 divisors, whose sum is σ = 7821419961600. Its totient is φ = 488639692800.

The previous prime is 2018021955811. The next prime is 2018021955883. The reversal of 2018021955840 is 485591208102.

2018021955840 is a `hidden beast` number, since 2 + 0 + 1 + 80 + 2 + 19 + 558 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×2018021955840² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 383578810 + ... + 383584070.

It is an arithmetic number, because the mean of its divisors is an integer number (13578854100).

Almost surely, 2^{2018021955840} is an apocalyptic number.

2018021955840 is a gapful number since it is divisible by the number (20) 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 2018021955840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3910709980800).

2018021955840 is an abundant number, since it is smaller than the sum of its proper divisors (5803398005760).

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

2018021955840 is a wasteful number, since it uses less digits than its factorization.

2018021955840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311 (or 6291 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 2018021955840 in words is "two trillion, eighteen billion, twenty-one million, nine hundred fifty-five thousand, eight hundred forty".