20789994 has 16 divisors (see below), whose sum is σ = 41764320. Its totient is φ = 6899280.

The previous prime is 20789927. The next prime is 20790017. The reversal of 20789994 is 49998702.

It is a happy number.

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, 6192 + ... + 8939.

It is an arithmetic number, because the mean of its divisors is an integer number (2610270).

Almost surely, 2^20789994 is an apocalyptic number.

20789994 is an abundant number, since it is smaller than the sum of its proper divisors (20974326).

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

20789994 is a wasteful number, since it uses less digits than its factorization.

20789994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15365.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 20789994 is about 4559.6045881195. The cubic root of 20789994 is about 274.9696671778.

The spelling of 20789994 in words is "twenty million, seven hundred eighty-nine thousand, nine hundred ninety-four".