20633994 has 32 divisors (see below), whose sum is σ = 46200000. Its totient is φ = 6826032.

The previous prime is 20633983. The next prime is 20634001. The reversal of 20633994 is 49933602.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6132 + ... + 8880.

It is an arithmetic number, because the mean of its divisors is an integer number (1443750).

Almost surely, 2^20633994 is an apocalyptic number.

20633994 is an abundant number, since it is smaller than the sum of its proper divisors (25566006).

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

20633994 is a wasteful number, since it uses less digits than its factorization.

20633994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899 (or 2893 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 20633994 is about 4542.4656300296. The cubic root of 20633994 is about 274.2801847379.

The spelling of 20633994 in words is "twenty million, six hundred thirty-three thousand, nine hundred ninety-four".