21463307382 has 64 divisors (see below), whose sum is σ = 48068536320. Its totient is φ = 6332524800.

The previous prime is 21463307377. The next prime is 21463307419. The reversal of 21463307382 is 28370336412.

It is a self number, because there is not a number n which added to its sum of digits gives 21463307382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1369563 + ... + 1385145.

It is an arithmetic number, because the mean of its divisors is an integer number (751070880).

Almost surely, 2^21463307382 is an apocalyptic number.

21463307382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21463307382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24034268160).

21463307382 is an abundant number, since it is smaller than the sum of its proper divisors (26605228938).

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

21463307382 is a wasteful number, since it uses less digits than its factorization.

21463307382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16149.

The product of its (nonzero) digits is 145152, while the sum is 39.

The spelling of 21463307382 in words is "twenty-one billion, four hundred sixty-three million, three hundred seven thousand, three hundred eighty-two".