21449941832 has 16 divisors (see below), whose sum is σ = 43874881200. Its totient is φ = 9749973520.

The previous prime is 21449941789. The next prime is 21449941873. The reversal of 21449941832 is 23814994412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121874582 + ... + 121874757.

It is an arithmetic number, because the mean of its divisors is an integer number (2742180075).

Almost surely, 2^21449941832 is an apocalyptic number.

21449941832 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21449941832 is an abundant number, since it is smaller than the sum of its proper divisors (22424939368).

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

21449941832 is a wasteful number, since it uses less digits than its factorization.

21449941832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243749356 (or 243749352 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The spelling of 21449941832 in words is "twenty-one billion, four hundred forty-nine million, nine hundred forty-one thousand, eight hundred thirty-two".