21742586048 has 56 divisors (see below), whose sum is σ = 44212703040. Its totient is φ = 10603111680.

The previous prime is 21742586023. The next prime is 21742586051. The reversal of 21742586048 is 84068524712.

It is a junction number, because it is equal to n+sod(n) for n = 21742585993 and 21742586011.

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, 2028383 + ... + 2039073.

Almost surely, 2^21742586048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21742586048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22106351520).

21742586048 is an abundant number, since it is smaller than the sum of its proper divisors (22470116992).

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

21742586048 is a wasteful number, since it uses less digits than its factorization.

21742586048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11485 (or 11475 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 47.

The spelling of 21742586048 in words is "twenty-one billion, seven hundred forty-two million, five hundred eighty-six thousand, forty-eight".