21095994 has 16 divisors (see below), whose sum is σ = 43332768. Its totient is φ = 6841872.

The previous prime is 21095989. The next prime is 21096001. The reversal of 21095994 is 49959012.

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, 47292 + ... + 47735.

It is an arithmetic number, because the mean of its divisors is an integer number (2708298).

Almost surely, 2^21095994 is an apocalyptic number.

21095994 is an abundant number, since it is smaller than the sum of its proper divisors (22236774).

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

21095994 is a wasteful number, since it uses less digits than its factorization.

21095994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95069.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 21095994 is about 4593.0375569986. The cubic root of 21095994 is about 276.3121599370.

The spelling of 21095994 in words is "twenty-one million, ninety-five thousand, nine hundred ninety-four".