21410693472 has 288 divisors, whose sum is σ = 67438635264. Its totient is φ = 5927040000.

The previous prime is 21410693441. The next prime is 21410693477. The reversal of 21410693472 is 27439601412.

It is a self number, because there is not a number n which added to its sum of digits gives 21410693472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21410693477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30542722 + ... + 30543422.

It is an arithmetic number, because the mean of its divisors is an integer number (234161928).

Almost surely, 2^21410693472 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 21410693472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33719317632).

21410693472 is an abundant number, since it is smaller than the sum of its proper divisors (46027941792).

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

21410693472 is a wasteful number, since it uses less digits than its factorization.

21410693472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21410693472 in words is "twenty-one billion, four hundred ten million, six hundred ninety-three thousand, four hundred seventy-two".