21896748 has 72 divisors (see below), whose sum is σ = 60252192. Its totient is φ = 6676992.

The previous prime is 21896717. The next prime is 21896767. The reversal of 21896748 is 84769812.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22161 + ... + 23127.

It is an arithmetic number, because the mean of its divisors is an integer number (836836).

Almost surely, 2^21896748 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 21896748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30126096).

21896748 is an abundant number, since it is smaller than the sum of its proper divisors (38355444).

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

21896748 is a wasteful number, since it uses less digits than its factorization.

21896748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031 (or 1026 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 21896748 is about 4679.3961148849. The cubic root of 21896748 is about 279.7648876685.

The spelling of 21896748 in words is "twenty-one million, eight hundred ninety-six thousand, seven hundred forty-eight".