2021774144 has 56 divisors (see below), whose sum is σ = 4346740608. Its totient is φ = 927475200.

The previous prime is 2021774123. The next prime is 2021774177. The reversal of 2021774144 is 4414771202.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2021774144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131669 + ... + 146219.

It is an arithmetic number, because the mean of its divisors is an integer number (77620368).

Almost surely, 2^2021774144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021774144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173370304).

2021774144 is an abundant number, since it is smaller than the sum of its proper divisors (2324966464).

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

2021774144 is a wasteful number, since it uses less digits than its factorization.

2021774144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14743 (or 14733 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 2021774144 is about 44964.1428696245. The cubic root of 2021774144 is about 1264.4768403332.

The spelling of 2021774144 in words is "two billion, twenty-one million, seven hundred seventy-four thousand, one hundred forty-four".