21449180594 has 16 divisors (see below), whose sum is σ = 32418559800. Its totient is φ = 10643042304.

The previous prime is 21449180591. The next prime is 21449180609. The reversal of 21449180594 is 49508194412.

It can be written as a sum of positive squares in 4 ways, for example, as 21449067025 + 113569 = 146455^2 + 337^2 .

It is not an unprimeable number, because it can be changed into a prime (21449180591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055522 + ... + 1075650.

Almost surely, 2^21449180594 is an apocalyptic number.

21449180594 is a deficient number, since it is larger than the sum of its proper divisors (10969379206).

21449180594 is a wasteful number, since it uses less digits than its factorization.

21449180594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24157.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 21449180594 in words is "twenty-one billion, four hundred forty-nine million, one hundred eighty thousand, five hundred ninety-four".