21073376 has 24 divisors (see below), whose sum is σ = 42111720. Its totient is φ = 10378368.

The previous prime is 21073363. The next prime is 21073379. The reversal of 21073376 is 67337012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21073379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2771 + ... + 7058.

It is an arithmetic number, because the mean of its divisors is an integer number (1754655).

Almost surely, 2^21073376 is an apocalyptic number.

It is an amenable number.

21073376 is a deficient number, since it is larger than the sum of its proper divisors (21038344).

21073376 is an equidigital number, since it uses as much as digits as its factorization.

21073376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9906 (or 9898 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 21073376 is about 4590.5746916917. The cubic root of 21073376 is about 276.2133755696.

The spelling of 21073376 in words is "twenty-one million, seventy-three thousand, three hundred seventy-six".