21269064 has 32 divisors (see below), whose sum is σ = 55008000. Its totient is φ = 6844992.

The previous prime is 21269033. The next prime is 21269077. The reversal of 21269064 is 46096212.

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, 14584 + ... + 15975.

It is an arithmetic number, because the mean of its divisors is an integer number (1719000).

Almost surely, 2^21269064 is an apocalyptic number.

21269064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21269064 is an abundant number, since it is smaller than the sum of its proper divisors (33738936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21269064 is a wasteful number, since it uses less digits than its factorization.

21269064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30597 (or 30593 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 21269064 is about 4611.8395462115. The cubic root of 21269064 is about 277.0657179196.

The spelling of 21269064 in words is "twenty-one million, two hundred sixty-nine thousand, sixty-four".