21346552384 has 112 divisors (see below), whose sum is σ = 46445667840. Its totient is φ = 9690439680.

The previous prime is 21346552363. The next prime is 21346552397. The reversal of 21346552384 is 48325564312.

It is a self number, because there is not a number n which added to its sum of digits gives 21346552384.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13119379 + ... + 13121005.

Almost surely, 2^21346552384 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 21346552384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23222833920).

21346552384 is an abundant number, since it is smaller than the sum of its proper divisors (25099115456).

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

21346552384 is a wasteful number, since it uses less digits than its factorization.

21346552384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076 (or 2066 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The spelling of 21346552384 in words is "twenty-one billion, three hundred forty-six million, five hundred fifty-two thousand, three hundred eighty-four".