21482319007944 has 48 divisors (see below), whose sum is σ = 58181820063900. Its totient is φ = 7160706612864.

The previous prime is 21482319007943. The next prime is 21482319007951. The reversal of 21482319007944 is 44970091328412.

21482319007944 is a `hidden beast` number, since 2 + 1 + 482 + 3 + 1 + 90 + 0 + 79 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20810840372100 + 671478635844 = 4561890^2 + 819438^2 .

It is a super-2 number, since 2×21482319007944² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21482319007943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6767982 + ... + 9421794.

Almost surely, 2^{21482319007944} is an apocalyptic number.

21482319007944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21482319007944 is an abundant number, since it is smaller than the sum of its proper divisors (36699501055956).

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

21482319007944 is a wasteful number, since it uses less digits than its factorization.

21482319007944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766254 (or 2766247 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 21482319007944 in words is "twenty-one trillion, four hundred eighty-two billion, three hundred nineteen million, seven thousand, nine hundred forty-four".