21353548 has 12 divisors (see below), whose sum is σ = 37732240. Its totient is φ = 10572912.

The previous prime is 21353539. The next prime is 21353561. The reversal of 21353548 is 84535312.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 25503 + ... + 26326.

Almost surely, 2^21353548 is an apocalyptic number.

It is an amenable number.

21353548 is a deficient number, since it is larger than the sum of its proper divisors (16378692).

21353548 is a wasteful number, since it uses less digits than its factorization.

21353548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51936 (or 51934 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 21353548 is about 4620.9899372321. The cubic root of 21353548 is about 277.4320825049.

The spelling of 21353548 in words is "twenty-one million, three hundred fifty-three thousand, five hundred forty-eight".