20965118 has 4 divisors (see below), whose sum is σ = 31447680. Its totient is φ = 10482558.

The previous prime is 20965117. The next prime is 20965127. The reversal of 20965118 is 81156902.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20965111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5241278 + ... + 5241281.

It is an arithmetic number, because the mean of its divisors is an integer number (7861920).

Almost surely, 2^20965118 is an apocalyptic number.

20965118 is a deficient number, since it is larger than the sum of its proper divisors (10482562).

20965118 is a wasteful number, since it uses less digits than its factorization.

20965118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10482561.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 20965118 is about 4578.7681749571. The cubic root of 20965118 is about 275.7395761667.

The spelling of 20965118 in words is "twenty million, nine hundred sixty-five thousand, one hundred eighteen".