21316415296 has 56 divisors (see below), whose sum is σ = 46337037120. Its totient is φ = 9648998400.

The previous prime is 21316415293. The next prime is 21316415347. The reversal of 21316415296 is 69251461312.

It is a super-2 number, since 2×21316415296² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21316415293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106845 + ... + 232483.

Almost surely, 2^21316415296 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 21316415296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23168518560).

21316415296 is an abundant number, since it is smaller than the sum of its proper divisors (25020621824).

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

21316415296 is a wasteful number, since it uses less digits than its factorization.

21316415296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125903 (or 125893 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The spelling of 21316415296 in words is "twenty-one billion, three hundred sixteen million, four hundred fifteen thousand, two hundred ninety-six".