21232994 has 16 divisors (see below), whose sum is σ = 33748800. Its totient is φ = 9990864.

The previous prime is 21232993. The next prime is 21233011. The reversal of 21232994 is 49923212.

It is a self number, because there is not a number n which added to its sum of digits gives 21232994.

It is not an unprimeable number, because it can be changed into a prime (21232993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4187 + ... + 7745.

It is an arithmetic number, because the mean of its divisors is an integer number (2109300).

Almost surely, 2^21232994 is an apocalyptic number.

21232994 is a deficient number, since it is larger than the sum of its proper divisors (12515806).

21232994 is a wasteful number, since it uses less digits than its factorization.

21232994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737.

The product of its digits is 7776, while the sum is 32.

The square root of 21232994 is about 4607.9272997737. The cubic root of 21232994 is about 276.9090049394.

The spelling of 21232994 in words is "twenty-one million, two hundred thirty-two thousand, nine hundred ninety-four".