2381220221832 has 24 divisors (see below), whose sum is σ = 6449138100990. Its totient is φ = 793740073920.

The previous prime is 2381220221777. The next prime is 2381220221851.

2381220221832 is a `hidden beast` number, since 2 + 381 + 2 + 20 + 221 + 8 + 32 = 666.

2381220221832 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 1502865135396 + 878355086436 = 1225914^2 + 937206^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16536251469 + ... + 16536251612.

Almost surely, 2^{2381220221832} is an apocalyptic number.

It is an amenable number.

2381220221832 is an abundant number, since it is smaller than the sum of its proper divisors (4067917879158).

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

2381220221832 is a wasteful number, since it uses less digits than its factorization.

2381220221832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33072503093 (or 33072503086 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 2381220221832 in words is "two trillion, three hundred eighty-one billion, two hundred twenty million, two hundred twenty-one thousand, eight hundred thirty-two".