21810096 has 180 divisors, whose sum is σ = 77733864. Its totient is φ = 5644800.

The previous prime is 21810079. The next prime is 21810109. The reversal of 21810096 is 69001812.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 77476 + ... + 77756.

Almost surely, 2^21810096 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 21810096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38866932).

21810096 is an abundant number, since it is smaller than the sum of its proper divisors (55923768).

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

21810096 is a wasteful number, since it uses less digits than its factorization.

21810096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 21810096 is about 4670.1280496363. The cubic root of 21810096 is about 279.3953619380.

The spelling of 21810096 in words is "twenty-one million, eight hundred ten thousand, ninety-six".