21234214444 has 24 divisors (see below), whose sum is σ = 37270594368. Its totient is φ = 10585505280.

The previous prime is 21234214433. The next prime is 21234214483. The reversal of 21234214444 is 44441243212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118172 + ... + 4123324.

It is an arithmetic number, because the mean of its divisors is an integer number (1552941432).

Almost surely, 2^21234214444 is an apocalyptic number.

It is an amenable number.

21234214444 is a deficient number, since it is larger than the sum of its proper divisors (16036379924).

21234214444 is a wasteful number, since it uses less digits than its factorization.

21234214444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8025 (or 8023 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

Adding to 21234214444 its reverse (44441243212), we get a palindrome (65675457656).

The spelling of 21234214444 in words is "twenty-one billion, two hundred thirty-four million, two hundred fourteen thousand, four hundred forty-four".