21082231296 has 480 divisors, whose sum is σ = 73425800448. Its totient is φ = 5693276160.

The previous prime is 21082231231. The next prime is 21082231333. The reversal of 21082231296 is 69213228012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21082231296.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 116476326 + ... + 116476506.

Almost surely, 2^21082231296 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 21082231296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36712900224).

21082231296 is an abundant number, since it is smaller than the sum of its proper divisors (52343569152).

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

21082231296 is a wasteful number, since it uses less digits than its factorization.

21082231296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 21082231296 in words is "twenty-one billion, eighty-two million, two hundred thirty-one thousand, two hundred ninety-six".