21144494162 has 8 divisors (see below), whose sum is σ = 34600081392. Its totient is φ = 9611133700.

The previous prime is 21144494131. The next prime is 21144494171. The reversal of 21144494162 is 26149444112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 480556664 + ... + 480556707.

It is an arithmetic number, because the mean of its divisors is an integer number (4325010174).

Almost surely, 2^21144494162 is an apocalyptic number.

21144494162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21144494162 is a deficient number, since it is larger than the sum of its proper divisors (13455587230).

21144494162 is a wasteful number, since it uses less digits than its factorization.

21144494162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961113384.

The product of its digits is 55296, while the sum is 38.

The spelling of 21144494162 in words is "twenty-one billion, one hundred forty-four million, four hundred ninety-four thousand, one hundred sixty-two".