21883571728144 has 45 divisors (see below), whose sum is σ = 49322069761671. Its totient is φ = 9378617461920.

The previous prime is 21883571728129. The next prime is 21883571728147. The reversal of 21883571728144 is 44182717538812.

It is a happy number.

The square root of 21883571728144 is 4677988.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (21883571728147) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 130900129 + ... + 131067199.

Almost surely, 2^{21883571728144} is an apocalyptic number.

21883571728144 is the 4677988-th square number.

It is an amenable number.

21883571728144 is an abundant number, since it is smaller than the sum of its proper divisors (27438498033527).

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

21883571728144 is an frugal number, since it uses more digits than its factorization.

21883571728144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334164 (or 167080 counting only the distinct ones).

The product of its digits is 24084480, while the sum is 61.

The spelling of 21883571728144 in words is "twenty-one trillion, eight hundred eighty-three billion, five hundred seventy-one million, seven hundred twenty-eight thousand, one hundred forty-four".