20994960 has 80 divisors (see below), whose sum is σ = 74388096. Its totient is φ = 4798464.

The previous prime is 20994959. The next prime is 20994979. The reversal of 20994960 is 6949902.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4569 + ... + 7928.

Almost surely, 2^20994960 is an apocalyptic number.

20994960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20994960 is an abundant number, since it is smaller than the sum of its proper divisors (53393136).

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

20994960 is a wasteful number, since it uses less digits than its factorization.

20994960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12520 (or 12514 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 20994960 is about 4582.0257528739. The cubic root of 20994960 is about 275.8703444788.

The spelling of 20994960 in words is "twenty million, nine hundred ninety-four thousand, nine hundred sixty".