21095064 has 48 divisors (see below), whose sum is σ = 59108400. Its totient is φ = 6788544.

The previous prime is 21095059. The next prime is 21095077. The reversal of 21095064 is 46059012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2964 + ... + 7139.

It is an arithmetic number, because the mean of its divisors is an integer number (1231425).

Almost surely, 2^21095064 is an apocalyptic number.

21095064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21095064 is an abundant number, since it is smaller than the sum of its proper divisors (38013336).

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

21095064 is a wasteful number, since it uses less digits than its factorization.

21095064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144 (or 10137 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 21095064 is about 4592.9363156917. The cubic root of 21095064 is about 276.3080995440.

The spelling of 21095064 in words is "twenty-one million, ninety-five thousand, sixty-four".