20994965 has 8 divisors (see below), whose sum is σ = 25780128. Its totient is φ = 16405200.

The previous prime is 20994959. The next prime is 20994979. The reversal of 20994965 is 56949902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20994965 - 2⁶ = 20994901 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 48611 + ... + 49040.

It is an arithmetic number, because the mean of its divisors is an integer number (3222516).

Almost surely, 2^20994965 is an apocalyptic number.

It is an amenable number.

20994965 is a deficient number, since it is larger than the sum of its proper divisors (4785163).

20994965 is an equidigital number, since it uses as much as digits as its factorization.

20994965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97699.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 20994965 is about 4582.0262984841. The cubic root of 20994965 is about 275.8703663785.

The spelling of 20994965 in words is "twenty million, nine hundred ninety-four thousand, nine hundred sixty-five".