21450096 has 80 divisors (see below), whose sum is σ = 62431520. Its totient is φ = 7138368.

The previous prime is 21450083. The next prime is 21450103. The reversal of 21450096 is 69005412.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34686 + ... + 35298.

It is an arithmetic number, because the mean of its divisors is an integer number (780394).

Almost surely, 2^21450096 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 21450096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31215760).

21450096 is an abundant number, since it is smaller than the sum of its proper divisors (40981424).

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

21450096 is an frugal number, since it uses more digits than its factorization.

21450096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21450096 is about 4631.4248347566. The cubic root of 21450096 is about 277.8495813429.

The spelling of 21450096 in words is "twenty-one million, four hundred fifty thousand, ninety-six".