20759955 has 16 divisors (see below), whose sum is σ = 33345024. Its totient is φ = 11028960.

The previous prime is 20759909. The next prime is 20759957. The reversal of 20759955 is 55995702.

It is not a de Polignac number, because 20759955 - 2⁶ = 20759891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20759957) by changing a digit.

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, 1512 + ... + 6618.

It is an arithmetic number, because the mean of its divisors is an integer number (2084064).

Almost surely, 2^20759955 is an apocalyptic number.

20759955 is a deficient number, since it is larger than the sum of its proper divisors (12585069).

20759955 is a wasteful number, since it uses less digits than its factorization.

20759955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386.

The product of its (nonzero) digits is 141750, while the sum is 42.

The square root of 20759955 is about 4556.3093617532. The cubic root of 20759955 is about 274.8371708245.

The spelling of 20759955 in words is "twenty million, seven hundred fifty-nine thousand, nine hundred fifty-five".