21927848 has 16 divisors (see below), whose sum is σ = 41201460. Its totient is φ = 10940800.

The previous prime is 21927847. The next prime is 21927859. The reversal of 21927848 is 84872912.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 6724 = 4682^2 + 82^2 .

It is a super-2 number, since 2×21927848² = 961661035822208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21927847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538 + ... + 6798.

Almost surely, 2^21927848 is an apocalyptic number.

It is an amenable number.

21927848 is a deficient number, since it is larger than the sum of its proper divisors (19273612).

21927848 is a wasteful number, since it uses less digits than its factorization.

21927848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788 (or 5784 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 21927848 is about 4682.7180141452. The cubic root of 21927848 is about 279.8972752427.

The spelling of 21927848 in words is "twenty-one million, nine hundred twenty-seven thousand, eight hundred forty-eight".