21896488 has 8 divisors (see below), whose sum is σ = 41055930. Its totient is φ = 10948240.

The previous prime is 21896477. The next prime is 21896491. The reversal of 21896488 is 88469812.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 2377764 = 4418^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1368523 + ... + 1368538.

Almost surely, 2^21896488 is an apocalyptic number.

It is an amenable number.

21896488 is a deficient number, since it is larger than the sum of its proper divisors (19159442).

21896488 is a wasteful number, since it uses less digits than its factorization.

21896488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737067 (or 2737063 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 21896488 is about 4679.3683334399. The cubic root of 21896488 is about 279.7637803632.

The spelling of 21896488 in words is "twenty-one million, eight hundred ninety-six thousand, four hundred eighty-eight".