21896000 has 224 divisors, whose sum is σ = 68470272. Its totient is φ = 6758400.

The previous prime is 21895969. The next prime is 21896027. The reversal of 21896000 is 69812.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 951989 + ... + 952011.

Almost surely, 2^21896000 is an apocalyptic number.

21896000 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 21896000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34235136).

21896000 is an abundant number, since it is smaller than the sum of its proper divisors (46574272).

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

21896000 is a wasteful number, since it uses less digits than its factorization.

21896000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 21896000 is about 4679.3161893593. The cubic root of 21896000 is about 279.7617020125.

The spelling of 21896000 in words is "twenty-one million, eight hundred ninety-six thousand".