21343626444 has 24 divisors (see below), whose sum is σ = 56916337408. Its totient is φ = 6098178960.

The previous prime is 21343626433. The next prime is 21343626487. The reversal of 21343626444 is 44462634312.

It is a nude number because it is divisible by every one of its digits.

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, 127045312 + ... + 127045479.

Almost surely, 2^21343626444 is an apocalyptic number.

It is an amenable number.

21343626444 is an abundant number, since it is smaller than the sum of its proper divisors (35572710964).

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

21343626444 is a wasteful number, since it uses less digits than its factorization.

21343626444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254090805 (or 254090803 counting only the distinct ones).

The product of its digits is 331776, while the sum is 39.

The spelling of 21343626444 in words is "twenty-one billion, three hundred forty-three million, six hundred twenty-six thousand, four hundred forty-four".