21306103392 has 96 divisors (see below), whose sum is σ = 64146345984. Its totient is φ = 6065740800.

The previous prime is 21306103387. The next prime is 21306103393. The reversal of 21306103392 is 29330160312.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21306103393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132417 + ... + 245247.

It is an arithmetic number, because the mean of its divisors is an integer number (668191104).

Almost surely, 2^21306103392 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 21306103392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32073172992).

21306103392 is an abundant number, since it is smaller than the sum of its proper divisors (42840242592).

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

21306103392 is a wasteful number, since it uses less digits than its factorization.

21306103392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113132 (or 113124 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The spelling of 21306103392 in words is "twenty-one billion, three hundred six million, one hundred three thousand, three hundred ninety-two".