2018955780 has 144 divisors (see below), whose sum is σ = 6499356864. Its totient is φ = 525813120.

The previous prime is 2018955767. The next prime is 2018955791. The reversal of 2018955780 is 875598102.

It is a happy number.

2018955780 is a `hidden beast` number, since 2 + 0 + 18 + 9 + 557 + 80 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204150 + ... + 213810.

Almost surely, 2^2018955780 is an apocalyptic number.

2018955780 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 2018955780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3249678432).

2018955780 is an abundant number, since it is smaller than the sum of its proper divisors (4480401084).

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

2018955780 is a wasteful number, since it uses less digits than its factorization.

2018955780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9728 (or 9714 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 2018955780 is about 44932.7918117715. The cubic root of 2018955780 is about 1263.8890046008.

The spelling of 2018955780 in words is "two billion, eighteen million, nine hundred fifty-five thousand, seven hundred eighty".