2211844373820 has 72 divisors (see below), whose sum is σ = 7062380292240. Its totient is φ = 558781735680.

The previous prime is 2211844373759. The next prime is 2211844373831. The reversal of 2211844373820 is 283734481122.

2211844373820 is a `hidden beast` number, since 2 + 2 + 1 + 184 + 437 + 38 + 2 + 0 = 666.

2211844373820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 323365641 + ... + 323372480.

It is an arithmetic number, because the mean of its divisors is an integer number (98088615170).

Almost surely, 2^{2211844373820} is an apocalyptic number.

2211844373820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211844373820 is an abundant number, since it is smaller than the sum of its proper divisors (4850535918420).

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

2211844373820 is a wasteful number, since it uses less digits than its factorization.

2211844373820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646738155 (or 646738150 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

It can be divided in two parts, 2211844 and 373820, that added together give a square (2585664 = 1608²).

The spelling of 2211844373820 in words is "two trillion, two hundred eleven billion, eight hundred forty-four million, three hundred seventy-three thousand, eight hundred twenty".