20994966 has 24 divisors (see below), whose sum is σ = 48165624. Its totient is φ = 6586560.

The previous prime is 20994959. The next prime is 20994979. The reversal of 20994966 is 66949902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34000 + ... + 34611.

It is an arithmetic number, because the mean of its divisors is an integer number (2006901).

Almost surely, 2^20994966 is an apocalyptic number.

20994966 is an abundant number, since it is smaller than the sum of its proper divisors (27170658).

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

20994966 is a wasteful number, since it uses less digits than its factorization.

20994966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68636 (or 68633 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 20994966 is about 4582.0264076061. The cubic root of 20994966 is about 275.8703707584.

The spelling of 20994966 in words is "twenty million, nine hundred ninety-four thousand, nine hundred sixty-six".