21148598 has 16 divisors (see below), whose sum is σ = 33032880. Its totient is φ = 10142496.

The previous prime is 21148597. The next prime is 21148601. The reversal of 21148598 is 89584112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21148597) 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 7 ways as a sum of consecutive naturals, for example, 8336 + ... + 10572.

It is an arithmetic number, because the mean of its divisors is an integer number (2064555).

Almost surely, 2^21148598 is an apocalyptic number.

21148598 is a deficient number, since it is larger than the sum of its proper divisors (11884282).

21148598 is a wasteful number, since it uses less digits than its factorization.

21148598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431.

The product of its digits is 23040, while the sum is 38.

The square root of 21148598 is about 4598.7604851742. The cubic root of 21148598 is about 276.5416357354.

The spelling of 21148598 in words is "twenty-one million, one hundred forty-eight thousand, five hundred ninety-eight".