21376546 has 16 divisors (see below), whose sum is σ = 33212160. Its totient is φ = 10308240.

The previous prime is 21376519. The next prime is 21376559. The reversal of 21376546 is 64567312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34225 + ... + 34843.

It is an arithmetic number, because the mean of its divisors is an integer number (2075760).

Almost surely, 2^21376546 is an apocalyptic number.

21376546 is a deficient number, since it is larger than the sum of its proper divisors (11835614).

21376546 is a wasteful number, since it uses less digits than its factorization.

21376546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209.

The product of its digits is 30240, while the sum is 34.

The square root of 21376546 is about 4623.4776954150. The cubic root of 21376546 is about 277.5316458783.

The spelling of 21376546 in words is "twenty-one million, three hundred seventy-six thousand, five hundred forty-six".