21076064 has 24 divisors (see below), whose sum is σ = 41596128. Its totient is φ = 10512000.

The previous prime is 21076061. The next prime is 21076087. The reversal of 21076064 is 46067012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21076061) 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, 23594 + ... + 24470.

It is an arithmetic number, because the mean of its divisors is an integer number (1733172).

Almost surely, 2^21076064 is an apocalyptic number.

It is an amenable number.

21076064 is a deficient number, since it is larger than the sum of its proper divisors (20520064).

21076064 is an equidigital number, since it uses as much as digits as its factorization.

21076064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 21076064 is about 4590.8674561568. The cubic root of 21076064 is about 276.2251191394.

The spelling of 21076064 in words is "twenty-one million, seventy-six thousand, sixty-four".