21095324460 has 216 divisors, whose sum is σ = 76450701600. Its totient is φ = 4611999744.

The previous prime is 21095324443. The next prime is 21095324461. The reversal of 21095324460 is 6442359012.

It is a happy number.

21095324460 is a `hidden beast` number, since 21 + 0 + 9 + 532 + 44 + 60 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (21095324461) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 650716 + ... + 682364.

Almost surely, 2^21095324460 is an apocalyptic number.

21095324460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21095324460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38225350800).

21095324460 is an abundant number, since it is smaller than the sum of its proper divisors (55355377140).

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

21095324460 is a wasteful number, since it uses less digits than its factorization.

21095324460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31717 (or 31689 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 21095324460 in words is "twenty-one billion, ninety-five million, three hundred twenty-four thousand, four hundred sixty".