21013348 has 12 divisors (see below), whose sum is σ = 36918252. Its totient is φ = 10465280.

The previous prime is 21013303. The next prime is 21013357. The reversal of 21013348 is 84331012.

It can be written as a sum of positive squares in 2 ways, for example, as 19554084 + 1459264 = 4422^2 + 1208^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9193 + ... + 11248.

It is an arithmetic number, because the mean of its divisors is an integer number (3076521).

Almost surely, 2^21013348 is an apocalyptic number.

It is an amenable number.

21013348 is a deficient number, since it is larger than the sum of its proper divisors (15904904).

21013348 is a wasteful number, since it uses less digits than its factorization.

21013348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20702 (or 20700 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21013348 is about 4584.0318498021. The cubic root of 21013348 is about 275.9508594162.

The spelling of 21013348 in words is "twenty-one million, thirteen thousand, three hundred forty-eight".